Sheer Bloody mindedness is a good place to start. If at first you don't succeed......lose some more. Just stick with it. Eventually things click (honest guv) and you start to win games
Disclaimer:- will not be held responsible if that does not actually happen
If I'm going through a patch like that I just turn the game off for a couple of days and leave it for a while

before coming back to it.
There is always the jump ship option if it looks like the sack is heading your way, and if it does happen, there are always clubs out there desperate for a manager (If any club offers me a job - they are desperate