I immediately go into freak out mode when I stop losing or- gasp!- gain a little for no reason. I really do have to talk myself off the ledge. Usually, I take the following actions:
1. I don't typically track my calories religiously, but I will start tracking with the Daily Plate so I can trouble shoot. Sometimes I find that my macros are out of whack and I'm eating too many carbs.
2. I mix up my workout. If I haven't been doing intervals, I'll start them up again (this is REALLY effective). Also, I will cut the strength training a little and up my cardio and I will mix it up between running and the elliptical. If you don't run, you could try going from walking to the elliptical to the stair climber to the bike, or whatever it is that you do for cardio.
3. I find that I'm not drinking enough water, so I will up my intake.
4. Look for the little stuff. Try not eating too close to bed time for a few days. I've found that this is a bit of a hinderance for me. For some reason, my body holds on to food I eat later in the evening.
Hope this helps
Stalls suck, plain and simple.