It depends what offers you go for mate!
Have you read my guide? Sure it's PPC based, but I change offers every 2/3 days for 2 reasons:
1/ Avoid the Google being gay
2/ I like variety
However there's a few other methods.
1/ Traditional bumming. I haven't tried this myself yet however!
2/ Incentive offers - You basically pay people like $0.05 to fill in an offer. (This only works where the campaigns ALLOW incent traffic. And they are usually low paying ($0.70 p/lead kinda low.)). A few networks offer incent traffic - AffSpy.com will give you more details.
3/ SEO - Using SEnuke for link wheels or manually building up a landing page (So kinda bum, but less of the articles).
4/ A secret method I'm working on after Inz's comments
Good luck mate!