I split my practice in 2 days wich I repeat whole time. Here´s how it looks:

Day 1:
Sweeping (1h)
Advanced 16-note pickin´ (scales/sequences) (1h)
3 Notes per string (scales/sequences) (1h)
Leraning new stuff & repeating old stuff

Day 2:
Arpegios (a la crossroad arps) (1h)
String Skipping (Much much Gilbert influenced licks) (1h)
Chromatic scales and playn´ some advanced (Dream Theater(Malmsteen/Gilbert/Vai...) solos 1(h) somtimes more.
Learning new stuff % repeating old.

It may look boring and monoton but one day does do the trick for me. And it usualy end up with 4h guitarplay evryday.