Aloimeh didn't mention using PMs to vote. It's possible to make all posts except the OP invisible to everyone except moderators until the end of the voting period. There will be less influence from other posters unless everybody starts mass PMing each other because they're obsessed with the potential results.
Exactly. If we could make it so only the OP's post is visible, and the other posts are visible only to the poster. So, say, I vote. Only AJ's post and my own are visible. That way I can still modify it and update throughout the day, if I so choose.
Only at the end of the day, the votes are gathered together and posts exposed to view for everyone.