I haven't practiced playing scales much, but I try to work out the notes in my head when we start a new jam. I use the 2,4,5,7,9,11,12 half step(s) method. I think it's easier than the Whole, Whole, Half, Whole, Whole, Whole, Half step method. Same thing really.
Another one we try to play with is the A, D, G, A major chords. I like to play A, d, G, A, Bb, A, Bb then start over. The C works well with it also. It just depends on where you try to fit it in with your tempo. These are usually in the E major bar chord, or the F major bar chord.
BTW, here is a great guitar chord generator. it will show you many variations, and if you put your cursor over the fret position it will show you the notes.http://www.ws64.com/guitarchords/gitmini/index.html