Many blog owners run ad units of some description to help generate blogging income. There are so many different ways to generate this income and so many different ad units that can be used. One Blog plugin that can help manage your ad units is the Adsense Manager for WordPress.
Although titled Adsense Manager, this plugin does more than just manage your Adsense ads. It now also supports AdBrite, AdGridWork, Adpinion, Adroll, Commission Junction, CrispAds, ShoppingAds, Yahoo!PN and WidgetBucks.
Automatic Ad Code Importer for all supported networks. Widgets & Sidebar Modules compatible (as used in the popular K2 theme). Automatic limiting of Ads to meet network T&Cs (Google 3 units/page)
This plugin generates the code automatically and allows the ad units to be placed using widgets. As it now supports so many different advertising streams, it possibly one of the best Adsense Ad managers around. It is easy to install and fairly easy to use. You really do need to read the instructions carefully however.
If you have ad units on your site then this blog plugin should make life a lot easier. The easier it is to manage your ad the easier it will be to increase your blogging income.
An indirect route to generating income could also be installing plugins like KeywordLuv and CommentLuv, which should bring in some traffic from other sites. Not in 100% of the cases, but in some cases it could gain some faithful readers who can only add to the popularity and revenue of the blog.