I'd check out www.cj.com or www.linkshare.com . Those 2 affiliate networks pretty much have everything you could want. Also, read up on CPA programs. Check out www.tribalfusion.com and www.CPAempire.com . CPA's are great because a lot of the time, you get paid $4-5 just for having someone fill out "Name & Email".
We combine CPM and Adsense, and each makes about 20 and 60 respectively per day, for a games website.
If you have a high PR site, you can try selling ad space or text links on your site (for a month / 6 months / year etc) and generate some extra revenue
Do you use PPCs to advertise your sites or are you getting the organic traffic from SEs? My affiliate efforts using the organic traffic result in only 3 to 4 sales per month
Correct, use affiliate programs, build sites etc. Since you probably already know that to make adsense work you need traffic and looks like you can generate it, the same applies to any affiliate program - set up a nice review site, drive traffic to it and make solid cash out of doing so. If you need one with support, free design templates, content, check my sig.
I use Both but for me best conversion is from S.E. and you maybe have bad product for sell or product that don't convert well
My sites just got fully indexed on Google, so I keep my fingeres crossed and wait for a huge influx of organic traffic If that would happen, the front page of my cbtrends.com site will change to "top selling make money, learn languages, train dogs, you name it" ebooks