40 Quick Guitar Tips! #2: Scales
There are over 4000 scales, while you don’t need to know all of them, but you should know the following: Major pentatonic, Minor pentatonic, Major scale, Harmonic minor, Melodic minor and Bebop dominant. You probably know a few of these already.
If you don’t know all of them, then buy my book on scales and plug any gaps you have – it will be more than worth it.