Around the house:
A sheet with a solid object in it or multiple. - Blunt trauma is good trauma when your not reciving it.
A spoon or fork or butter-knife. - Very easy to get most any place that has food and each has it's own fighting style.
A coffee pot, it has a handle and it is glass. - One good whack and you got yorself a knife with a protective handle and sometimes even a knocked out victim depends on how heavy the glass is.
A console controller, older ones with cords work better. - With a cord you got a nice modern dail flail, without you got a shitty softball, though don't get me wrong still does some damage, and the cord also doubles as a strangling rope.
A hard back book, thicker the better. - Nothing like bashing heads in with hard covers, and corners are good for penetration the first couple uses.
A soft back book and a lighter or matches. - This right here is the easiest fire bomb to make, hell if you want to do pre-prep soak it in a flamable liquid and which it burn. (Warning on pre-soakers you light and you throw so you better be quick.)
A pen or sharpened pencil. - Who hasn't thought how much damage these can do?
A wooden spoon. - You all know you fear it, hell if my grandma picked one up all of us kids ran!
A baseball. - Good arm and good aim these can become killer weapons and if not that can take a person off their feet.
A baseball bat. - We all know it's all about the homerun swings.
A steam Iron. - Without a plug is the best since you have a lot better range, but with cords they can be good for a hit or two.
A woofle ball bat. - They hurt worse after they break and you can also stab them after.
Around the yard:
A rake. - Metal rakes are a lot nicer then leave rakes but both have their own means.
A hoe. - The gardeners delight, a good one can scalp a person in one swing, a bad one might get stuck half-way though.
A shovel. - All I have to say here is PING!
A plastic chair. - Got to love those bastards that break when you weigh too much or someone before you sat in it that weighed to much when it comes to fights.
A garden spade and it's sister the garden fork. - People saying that gardeners are the least dangerous person around are so wrong, they have some great weapons of choice.
A tree branch. - They last for a short while but tend to be a bunch of them normally if you have them.
A rock. - Good arm and good aim these can become killer weapons and if not that can take a person off their feet.
A thorny bush. - Ever had someone hit you with a batch of roses that haven't been de-thorned it hurts like a bitch, also remember those good ole blackberry bushes.
The bar and club:
A Putter (golf club). - depending on the style of putter depends on the damage, the smaller ended ones the better.
A Iron (golf club). - Now watch out for them sandtraps, and swing heavy and aim right!
A driver or wood (golf club) - Make sure to yell fore before you swing and aim for that ball, you want him screaming in pain and agony.
A golf ball. - Good arm and good aim these can become killer weapons and if not that can take a person off their feet.
A empty or non-empty bottle of alcohol (bar). - Full or empty you can bust these bastards over that foul head of the person your against and then you have something to stab them with.
A poolstick. - You will get a few hits out of this and a few more stabs once it spliters.
A stool (bar). - Metal hurst worst at first wood hurst worse later, pick your poison.
In the shop (some are more easily handy then others out of the shop):
A oxy-acetylene hand-torch. - Fire is a great weapon when it can melt skin!
A hammer which I prefer ballpeen style. - Hammers are great in almost every case.
A nail gun. - Right away much more effective then a stapler and also if you got one that handles bigger nails you got an even more dangerous weapon.
A flat head screwdriver. - Sort of like the handymans knife when in a tight spot.
A phillips screwdriver, heated or non-heated by torch. - Heated this makes a better weapon then non since it breaks skin easier red hot, otherwise similar to flathead.
A monkey wrench. - A very powerfull weapon especially if the person can swing a baseball bat well.
A steel or iron chain. - Right here you got one weapon as long as you know how to twist and fling it you can do good damage.
A lead pipe. - These things hurt like a bitch believe me...
A sheet of fiberglass. - May not be great for cutting but damn can you hit someone out with this stuff nicely.
Too the road:
A car. - Whether you have to hotwire it or not a good strip to accel with you got yourself the modern age battering ram.
A muffler. - If it is hot of a car broken I hope you have some thick gloves otherwise it will be as good of a weapon for you as it was for them.
A jack. - Great for busting windows of on coming cars and can prove even more fatal.
A tire iron. - whether it is the L or the + or the | bar it does a good damage depending on fighting style.
A blown out tire piece. - Nothing like wires and rubber, you can tear someone up with a good piece of tire.
Exotics:
A sword. - Katana, short sword, bastard sword, long sword, or hell even a rapier are great weapons if you fight well with them.
A gun. - Wether it is a shotgun, rifle, or handgun they all server there uses.
A knife. - Easy to coceal great for sneak attacks not too great for people who know your pissed at them.
A charge of explosives. - Whether it is a homade moltov or a real grenade or some homade pipe-bomb they all work good.
A potato cannon or similar. - You can set this things up to shoot about anything and hell even potatos hurt from these bastards.
A blow dart-gun. - Good lungs equals good weapon.
A bow or crossbow. - A bow requires a bit more then a crossbow since you have to have a bit more strength but both are great.
A nightstick. - Only not an exotic if your a cop, but past that these things have a great extra bit for fighting with that handle sticking out or battering stick.
Pre-prep:
A microwave with certain metals in it. - You set this up as a ticking time bomb, but you have to have atleast a five minute pre-prep of knowing that person is going to be there.
A syringe with various drugs. - This is a fun one and from past knowledge the syringe comes along a lot easier then the drugs, good for incapitating the enemy.
A very loud music system and a good set of ear-plugs. - This takes a bit of knowledge on setting up a sounds system with amps so unless you play with this stuff it won't be as effective, nothing like watching ear-drums get blown out.
PS: I think I will stop their I am starting to scare myself. Also sorry about any double posts for weapons I sort of just got carried away.
TL:DR I really think a lot about what I can use for a weapon around my every day life. Also I will not comment on the pre-prep ones.