I was a July minicamp attendee. I did the big reading through the Sequences thing when lukeprog was doing it at Common Sense Atheism, so I'd day fewer of the benefits were rationality level-ups and more were life hacking. Post-minicamp I am:

• doing sit-ups, push-ups, and squats every day (using the apps from the 200 situps guy), up from not doing this at all
• martial arts training four times a week (aikido and krav) again, up from not doing things at all
• using RTM to manage tasks which means
• dropping way fewer small tasks
• breaking tasks down into steps more efficiently
• knocked off about three lagging tasks (not timebound, so I was making no progress on them) in the month that I got back
• stopped using inbox as task manager, so I could actually only keep emails I was replying to in there
• using beeminder to get down to inbox zero (currently three)
• working in pomodoros has sped up my writing to the point where:
• I miss doing a daily posts to my blog more rarely (one over two weeks compared to 0-2 a week) and have had more double post days than previously (which translates into higher page views and more money for me)
• Less time writing left me more time for leisure reading