A paradiddle is a pattern consisting of two single strokes followed by a double stroke. This means the sticking used will be either LRLL or RLRR for a single paradiddle.
The first note of a paradiddle is an accented DOWN stroke.
The second note is an unaccented UP stroke. The next time this hand will be used is the downbeat of the next paradiddle.
The paired "diddle" notes are unaccented tap strokes.
The syllables of the word "paradiddle" itself line up with pattern. Remember... it's not just a funny sounding word! Paradiddles are very useful rudiments because they allow you to easily switch your lead hand (from a right hand lead to a left hand lead, or vice versa).
Avoid emphasizing the "RA" syllable (second note)! It is an unaccented upstroke preparing the next accent.
As with everything in drumming, get the patterns to sound the same no matter which hand is leading.
All of the remaining exercises in this lesson incorporate extended paradiddle patterns. Check out Diddle Rudiments to see all of the official paradiddle rudiments.