I take measurements and use the scale.
I think that slow and steady wins the race, as I've lost 4 pounds per week for a few weeks, now it's slowly been 1-2 or just 1. It's important to go slow, so you are able to maintaina nd not lose so fast your body gains it back the second you look at a cheeseburger!
I've been having plateaus, but I haven't gained anything back. good luck on your journey!