I received a few messages asking if I warm up before I practice. Yes I do although my warm up routine isn't as complex as it used to be. Aside from alternate picking scale runs or occasionally sweeping through some arpeggios, I warm up using the examples below.
I set a metronome at a reasonable tempo, then work through the examples in different rhythms. ( Quarter notes, eighth notes, eighth note triplets, sixteenths, etc.) Once you have got the hang of it, try skipping every other string.