If you were playing quarter notes it'd be all down picks, which you don't want to be doing at 250bmp. Scales are a great way to practice alternate picking with eight notes, count 1&2&3&4& by picking downwards on the numbers and picking upwards on the "and" or off-beat.
If that's too easy you can always do sixteenth notes.
Originally Posted by: RazboHeheh, I was going to ask that at one point, but figured I'd be suggested to double the count. I think that thing is a blast, anyway. Sometimes when I'm feeling uninspired and don't feel like lessons I'll put it on the tempo increase... More fun than Guitar Hero! :D
Check out http://littlebigstar.net/main/ if you're looking for a fun way to practice. Pop in any guitar pro file and try and play along, you can change tempo on the fly, which makes it a great way to learn a song with a tricky melody.