Hi guys, before i show you how to do this, please keep in mind that i have been playing guitar for only 2 years, so all you theory and shred experts give me a break if there is a easier way, it's just the way i do things.
ok, you need to have a rough idea about whereabouts the notes are on the fretboard. My favirote mix is Aminor with Gmajor, so what i do is look for the A and i know that i can play oxooxo etc on that string because that's the intervals for A minor, what i also can do is after i play a some aminor, on the same string or any string with G and i everyone knows the interval for major scales wwhwwwh so you can mix these intervals up and turn it into 1 scale which saves you drooling at scale charts and not learning anything (i used to be guilty), and it dosen't really have to be 2 scales it can be anything in the key of Gmaj or A minor, and i find that it unlocks and develops into your own style. I hope you found this a little bit helpful. And again, please don't rip my head off if there is a easier way or say WELL DUH! Because i'm only trying to help.