Please do share, but I use an app and it manages my uploads pretty well, especially if you have a mac. It's called droplr & cloud and I highly recommend them both. However they have a limit to how much you can upload to them on the FREE version and I uploaded quite a bit of the music I sell and haven't reached that limit yet. The payed version let's you upload larger files and limitlessly, obviously but the free version works for me just fine.
I also suggest dropsend. It delivers HUGE files for a temporary amount of time but if you pay for their service it makes the time unlimited.