I was cramming for a gig this last week- a whopper set with over 64 songs and less than 4 days to work it up. Desperate for any edge I could get, I dropped $30 on the practice software AnyTune. AnyTune allows you to organize MP3s into sets, tag specific songs to practice, stair step up and down the tempo and key signature, and much much more.
After spending about 15 hours using it, it literally was the difference between me playing the gig well and bombing. If you want to take your practice to the next level, I’d recommend getting it ASAP from the Mac App Store (they also have an iOS app, but I haven’t used it yet).
NOTE: this blog isn’t supported by AnyTune in any way (see what I did there?). I just freaking love this product.