Here's how I coordinate my schedule:
1. Set a yearlong calendar with the number of classroom lessons to teach in each grade level and a plan for topics to cover.
2. Create a weekly plan with groups to run, planned meetings, and other scheduled items.
3. Allow teachers to sign up for classroom lessons in a google doc . Because you've already scheduled your groups and put those in the google doc, you won't get double booked or realize that the one time a kid is available for a group, you have a class.
4. When your schedule is done, it will look something like this. You can fill in your individual counseling, parent meetings, teacher consults and all those other things you do in the empty slots.
This has worked pretty well for me over the years. I like to be organized and know ahead of time what I am doing. The problem I fall into is having too many things scheduled. If your schedule is too full, you can't fit in enough responsive services to meet the needs in your school.
How does scheduling work for you? I am lucky enough to not be on the specialist rotation at my school. If I were, I could likely do the same scheduling routine but it would be much harder to fit everything in. Good luck in the new school year!