You seriously think you're the only one to ask this? Granted, you're among the small number to have already realized the overseeding issue, but this is the most (or second-most) common question to be asked on the help forum. You don't even have to search - the board is laden with questions like these.
Stay off the offers page, unless you really want to see what people have been offering, or do what was suggested above. None of the torrents you will find there are active. What you want is the browse page. You can't search until you've been a member for a week, so this is pretty much all you can do.
The criteria for freeleech torrents is listed in the Wiki. The following torrents are all freeleech:
-All 1080p
-All artbooks
-All torrents under 100MB
-All music videos (I think)
As you might expect, the most popular out of those four categories is the 1080p stuff.
The best way to find freeleech stuff is to order the browse page by file size. 1080p stuff tends to be huge, which is why it's freeleech in the first place.
Finally, I'll close with a few facts: you cannot be warned within your first week here (don't quote me on that, but I'm pretty sure the grace period is one week), and you cannot be warned until you have downloaded at least 25GB. Keep these in mind while you are building your startoff ratio and you'll be fine.
P.S. be prepared to seed stuff forever. One of my longest seeds is 24 900 hours, which is roughly 2.8 years. I've only been a member for 3.6 or so years.
