If you want to tune your drum head but it does not sound the was you want, follow these steps
Step 1: Take Your Skin Off Completely.
Just take off your skin in this step.
Step 2: Finger Tighten It
Tighten the head the tightest you can using only your fingers. This will give you a roughly even tighten on all sides.
Step 3: Start the Tightening
Start tightening in the pattern as shown in the photos
Step 4: Polish Up
When you have a good tighten on your drum, remember to polish up for a good sounding drum. For a tight sound, tighten it tighter than usual. For a dark sounding drum, tighten it but not as tight. (If you really want a dark drum, I can suggest 2 ply heads)