I have blogged a-plenty about lots of different ideas for delivery and reinforcement, engagement and planning.
So I have started using something archaic - pen and paper - to keep an overview on tasks I have done with each class.
I have a spreadsheet with lots of different activities listed on it, and all my classes. Each time I do one of the activity types listed, I put the date in the relevant box. That way, I know I am doing a range of activities, and also that the lessons aren't stale or predictable.
Back to basics. I didn't say it was revolutionary.