Watch the Technique 1 online guitar lesson by John Stowell from Modern Chord Melody
Technique 1 I'm addressing some basic technique and warm-up issues here. Two important words to remember in beginning any practice session: slowly and evenly. Approaching anything in this manner gives your fingers the chance to develop muscle memory and your ears the ability to internalize the sounds.
Chromatic scales ascending and descending are a great way to develop good right/left hand coordination and get your picking hand relaxed and fluid. Chromatic harmony is often used in melodies and solos as well.
Any scale or arpeggio should be played in five positions on the neck (ascending and descending) to outline the harmony utilizing the full range of the instrument. I don't think that there is one correct set of scale or arpeggio fingerings. Over the years I've seen many different guitarists, and everybody has their own variations with regards to patterns; that's fine as long as the harmony is covered. Once the individual fingerings are comfortable, it's important to connect the positions so that you can move confidently up and down the neck. I suggest playing on a tune and limiting yourself to two or three strings (adjacent or non-adjacent) to develop the facility to connect positions. As with anything in your practice routine, moving slowly and evenly will develop muscle memory and ear training together.