I've tried a lot of different things with varying success. When I was diagnosed with insulin resistance my doctor told me to cut back on the carbs.
Right now I'm eating between 30-40g of carbs per day. Sometimes less. It works out to something like this:
3 meals per day at 10g carbs each max
2 snacks at 5g carbs max each
And if I want I can have a small glass of non-sweet wine like a good cabernet.
Exercise: right now I'm not sticking to anything like I should. Gotta get busy! but I enjoy hikes, walking, running a little, biking, and canoeing.
Counting calories worked for a little while but then I was having trouble. I would actually gain weight even though I had a calorie deficit. It was discouraging.
Lowering the carbs has helped with the insulin issues and my weight is finally dropping again. As I get closer to goal I'll add in more carbs to see what my body can handle. Every body is different so while I may max out at 50g carbs someone else may be able to have 100g carbs. I'll cross that bridge when I come to it. Right now I'm still just trying to lose weight. And so far it's working great!