Mecal,
You need to focus on your 2 main accts and try to get awards out of them. I see that as US and WN. Just be careful that WN credits expires or go to half life in 12 month from activity. Although if I reach a free ticket for US, I would be tempted to use it quickly since they are having a bit of problem right now.
A good place to find standard and bonus FF Miles and Points are:
http://www.smarterliving.com/ff/
US has some interesting bonuses for services with Nextel, Sprint long distance and Diners Club, B of A Visa and IDine. Other bonuses include 1K for e-mail statement, 3K for 1st online booking of ticket and 1K for kiosk checkin.