Ctrl-alt-L (cmd-alt-L) is my all-time favorite. It reformats the code consistently. It's the first thing I do when I start work on a new codebase, and the last thing I do before a commit.

No need for endless discussions on which style is best, as the IDE allows you to set the preferences on a per-project basis. It can also read editor config dotfiles so you can use code formatting consistently throughout a team.