Augmented and Diminished Intervals

A Double Augmented 2nd is the same as a Major 3rd.
A Diminished 3rd is the same as a Major 2nd.
A Diminished 4th is the same as a Major 3rd.
An augmented 2nd is the same as a Minor 3rd.

Guitar

look for patterns. wait for the question to be asked before answering. Always remember if the pattern is on the G and B string you have to shift your answer by 1 fret!!
This is SOOOO addicting!!!

Triads

How do you know which triads are major and which are minor in a given key?

Piano Drills

What are the most common drills I should be practicing on the piano?

Accidentals

When you are using music notation, how do you know when you are supposed to use a sharp vs a flat?