Stir well once. I never need to interact more than 4 times / 20 seconds with the pot:

1. Put water into
2. Put pasta in bolling water together with salt
3. Wait 30 seconds, then stir for a few seconds
4. Take pot off and pour out

In addition to that, if you don’t have a feeling for how long the pasta needs to boil / how done pasta looks, you need to sample a noodle now and again.