When I was having frequent and lengthy stalls, I now think it was because I was changing things too radically too often. I could be wrong. You never know why a stall really ends. I started making radical changes but I gave the changes a couple weeks before I decided it wasn't working...and my changes started to actually work. My favorite change is to increase or change up the exercise, but again, give it time to work.
I stall two weeks out of every month no matter what I do. Once I came to peace with that, I have a very nice routine of stalling two weeks, then losing two weeks. With that pattern I lost 4-8 pounds per month with is an average of 1-2 pounds per week.
I just stopped fighting the stall. That's assuming you're on plan, of course.