If you're just practicing the scales and working on getting them into your ear, use the same principals with all scales. 2nd's, 3rds, 4ths, etc. Also any repetitive patterns, sequences ascending and descending. 8th notes, triplets. Start on different parts of the beat. It's amazing how you can take the exact same sequence and play different note groupings and start on a different part of the beat and it sounds totally different.
I like to start playing a scale in each of the 5 positions and get that down. Then I work on connecting them. Barry mentions challenging yourself to move horizontally on each string (one at a time), which is a great idea. if you want to work on a ii-V-I and use the altered scale over the V, then play a dorian idea for one bar and whatever string you end on, move up or down either 1/2 or a whole step to get to the nearest note of the alt scale. Do that will all six strings, in all 5 positions. Same thing when you come out of your alt idea and resolve to the tonic.
I've covered a lot here, and I don't recommend getting overly academic. The goal is to free yourself from hunting on the fretboard and getting to the point where your ear is the guide.