Why a few months? You can rack up visits by just doing blog posts. I can take most blogs and turn it into a 20K visitors/week blog in no time. Not a great deal of traffic, but enough to start making good tests.
November 2012. The headline was something along the lines of "If X does not fix Y, our Alpaca leave you a voicemail." It improved conversion by about 20% (image vs no image). Same headline.
- babies (various poses, ages)
- tools (wrenches, screwdrivers, axes, etc)
- clothing
- auto parts
- aliens (as in fake grey aliens)
- people in weird situations
- women crying (this one works well near saint valentines)
- an animal with a cast (better yet if its a small bird)
- toilet paper (a new roll. not used)
- random charts (pie, bar, etc.)(The charts doesnt even need to make sense)
- a lock (big master lock)
- and one time I ran an alpaca. Weirdly, it converted better than anything else. Don't ask.