Guys, thanks a lot for all your tips! That's like a miniature weightloss encyclopedia in one thread... Remember, not so many years ago I'd have to pay to get this information....
I really appreciate it. I'm going to use several of these, I'll let you know in further detail. Right now my strategy is to eat high protein / low carb meals often (keeps me from getting hungry for several hours by keeping my insulin levels low) and eating as much vegetables as possible. I will also walk for an hour four times a week, and do a circuit training workout coupled with walking three times a week. I am not able to join a gym right now (I can't pay the fees, to be honest), but will do so as soon as I get a job...
Anyway, about me:
I'm a guy
I weigh 248 pounds
I'm 6'1"
I'm 29 years old
My bodyfat percentage:
30.1 
(I am so ashamed of this, you have no idea)
Thanks again, I'll be back later - right now I have to get some sleep....