Affiliate Resources

Affiliate Forums

General Monetization Forums

Digitalpoint Good for Adwords, Adsense and more besides.

Misc.

AffiliateBounty Promises to be a seriously good merchant locator.
Google Trends Is the keyword becoming more or less popular?
Wordtracker Exact keywords used in searchs.

Desktop Software

Roboform Password protects your list of login details (among other things). A dropdown list of links with auto submit makes checking sales reports a doddle. The free version is restricted to ten form pages, so you'll want to buy the unlimited version.