I ask the same question often. You can have all the strategies in the world but if you don't have the willpower to do them, thats when its really hard.

For me, it is often the pain of yesterday's memories and the seemingly hopelessness of tomorrow that triggers my thoughts. Hence I try to think about today. That doesn't always work, but some form of distraction, mindfulness, exercise etc etc or other strategy does. Or simply allowing yourself to feel sad, mad, angry and being ok with it. Giving yourself a break, realizing everyone has bad days etc.

And medication. Well for me anyways.

hugs