BH,

The first thing you want to do is to make sure that you have those 5 patterns memorized. It is important to know these without any doubts or hesitation.

There are a bunch of ways to keep pentatonic scales sounding interesting. You can use triplets as dvenetian said, and you can also play groupings of four. Start on the first note of the scale and play the first four notes, then start on the second note of the scale and play four notes. Work this pattern through all of the shapes.