Site Rotations

So I love the benefits of tubeless pumping but I have a barely passable success rate with new pods. I have trouble with getting the canula to insert properly. I do pinch up my skin which helps, but still have lots of failures (30 plus percent). I wonder if I don’t rotate my sites as much as u should. Does anyone have any tips for keeping track of site rotations? Or any tips for getting pods to work?