37signals' online PIM service Backpack is known far and wide in part for its extreme simplicity. It offers everything you need with nothing you don't - but that doesn't mean it's lacking in the power user department. While it hasn't been updated in a while, 37signals maintains a Power Users archive page at the Backpack blog with a whole slew of tips and tricks that will likely serve as a great review for old schoolers, or a killer resource for those new to the handy service. Some of our favorites include prefixing reminders with a plus sign and a number to quickly set an alarm for a few minutes or hours, as well as being able to email pictures and even lists of items to pages.Since that blog hasn't been updated in a while though, what other tricks have you users discovered for the service? Let's see if 37signals' Backpack blogger(s) have been laying down on the job.
