Use your creativity and come up with some different stations. Or just use some old standbys such as hitting stations, throwing stations, catching stations, fielding stations or pitching stations.
Practices in any sport can be boring and unproductive if not planned out ahead of time. Having a clipboard with your practice itinerary written out is just a good solid idea. You can keep track of your time slots for certain drills, and by keeping these on file you will know what you have covered.
Keep your practices to 90 minutes when possible. I realize that early preseason practices will likely go over due to weather wiping out some valuable time early on.