You remember the methodology: learn each of the lettered practice exercises, and play them many times, say for one minute each. Then combine them; play every combination of patterns:
A-B, A-C, A-D, etc / B-C, B-D, B-E, etc / C-D, C-E, etc
For whatever letter exercise is first in the combination, you only have to combine it with letters that come after it. For example you don't have to practice B-A, because you already did A-B when you practiced the As.
Play each exercise in the combination one or two times; play the sequence many times:
||: A - B :||
||: A - A- B - B :||
The cymbal part in the exercises can be played on any cymbal; if an open hihat is indicated, play that exercise on the hihat. The drum parts can be played on the snare drum or moving around the drums.
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