Here's a complete free guitar scales pdf ebook, entitled "84 Guitar Scales and Arpeggios Patterns". A downloadable pdf with plenty of scales patterns, with different fingerings and fretboard positions. For each scale, you can learn a number of different shapes, depending on the zone of the fretboard you're working on. The ebook contains of course the most important scales for beginners, such as major and minor, but shows also more advanced charts such as triads arpeggios, seventh chords arpeggios, pentatonic and blues scales.
There are various tips when it comes to practice guitar scales. First of all, start slow and try to be as much as possible clean and accurate.
When you're working on a new scale, always use a metronome.
With time, you can increase the speed gradually, but take your time, music is not a race. This lesson about speed picking exercise gives you plenty of insights. Check it out here.
In this section you can find major, harmonic minor, melodic minor, bachian, chromatic, in different shapes and fretboard positions.
A must for every guitar player: pentatonic minor and blues scales tabs. Here's an example:
Charts of all modes: ionian, aeolian, dorian, phrygian, locrian, lydian, mixolydian.
Whole-tone and half-step diminished, for a quite interesting sound.
Triads are the building blocks of the harmony. You'll learn the patterns of major triads, minor triads, augmented and diminished triads arpeggios.
Just add one note to a triad, and voilà, you're playing a seventh chord. In this section you'll be taught about different kinds of seventh arpeggios, as usua in different parts of the fretboard.