What are the best tools for affiliates?

[Shane_TDF]

I've been evaluating what we are offering right now in the way of affiliate tool. There aren't tons of hosted tools though there are some, and I do put together custom content zips for affiliates to use. Of course theres your standard banners as well but I'm still trying to decide where to go next.
I dont' want to waste a ton of time on developing tools that webmasters won't use or won't convert well.
So I've been considering the following:
RSS
Blogs
Free Sites
Half Page Ad's
Full Page Ad's
video clips for tube sites.

Any of these stand out for you guys or are they all just as good as the other?

Thanks for your feedback!