Triads Made Easy Theory Things   William Wieland
Triads 3 pitches every other letter

The simplest position on the staff is line-line-line or space-space-space.
Major
Minor
Diminished
Augmented
Memorize
Lower the 3rd (of a major triad)
3 half steps, 3 half steps
Raise the 5th (of a major triad)