First tip. Stop saying that you SUCK! You may beleive yourself one day. I don't like hearing this from people. You probably don't suck at all. I don't how long you've been playing but give yourself a break and enjoy what you can do.
You can always check out my site there's some good exercises.
Right now I don't really know what to post in my site so if you'd like to learn something in particular, let me know and I'll make a lesson out of it.
I want to post my tricks at in this website but my soundclips are a bit too big right now. Eventually I'll shrink them and post it along the great ones in here.