...and then read page 38 of Syncopation with your right hand on the ride cymbal. As Allison points out, this really helps to free up your right hand and allow you to break away from common patterns.
This is the same general concept as the Kiko Freitas samba ideas we looked at recently where the feet and left hand play common samba rhythms and the right hand improvises in a telecoteco style. Both of these are a really nice way to break out of the habit of thinking about ostinatos in your right hand and improvising with the left.
If page 38 is going by to quickly for you, don't forget that pages 34-37 are great to give yourself a little more time and repetition to get used to this, or any, concept. I often do this myself and recommend it to my students as well.
As you get more comfortable, experiment with different sounds on the ride. Play the bell, shoulder it a bit, etc. Or, if you prefer a bit more structure in the practice room, try this....
Play everything on the bell. But whenever there are two or more 8th notes in a row, start on the bow, and only play the last note of the group on the bell. So the first two lines become this...