I'm following guitar.about.com's series of lessons. I'm on lesson 4. The lessons says to warmup by playing the chromatic scale. (open 6th, frets 1, 2, 3, and 4, open 5th and so on...) and the E phrygian scale. I'm not sure these scales are helpful to me. Should I be playing the blues scale, pentatonic scales, etc.?
Its a warmup. I sit and play chromatic scales up and down the neck as a warmup to. I also run through some riffs with quick PM in them to get both hands working. It doesn't really matter, its a warmup.