Here is something that has helped me a lot...
I watched an interview with a Navy SEAL trainer, where he talked about people dropping out of SEAL training. Roughly 75% of the people who start the training drop out. He said the people who fail have a "long horizon." They are miserable in this training -- wet, exhausted, hungry, angry -- and the people who fail say to themselves, "I can't handle two more weeks of this." They think that every moment will be like the one they are currently experiencing and they quit. The ones who succeed and graduate have a very short horizon. "I can make it until dinner break." "I can make it until they let me take a 20 minute nap." "I can make it through sundown." And when they reach that horizon, they set a new short horizon.
Just tell yourself, "I can make it until I leave work for the day." Then, "I can make it until dinner time." Then, "I can make it until bedtime." Keep giving yourself short horizons until you've gotten through this stage. You can do it!
