there are several sites that give advice on how to do exactly what you are refering to.
I recommend upi browse the www.bonuswhores.com
site to get some good advice. They provide alot of information about the rules and requirements of each site, which will save you alot of research and so you don't have any surprises
There is also alot of good information and tips in this forum to help you clear your bonus dollars
For AP check out this thread http://www.hasselquist.net/forum/viewtopic.php?t=1052
it has excellent tips