I wish I had a sure fire method. Keeping myself busy does help. Yet, when I think about that

, I go "
Hey, diversions and distractions is what you relied on for 30+ years to AVOID dealing with being trans". (Did I mention I can overthink things? Plus, as an engineer, it is an occupational hazard) Keeping busy only works while I am busy. Most days, as you mentioned, as soon as the head hits the pillow it is full speed ahead on thinking. Self medicating w/alcohol is not a good way to quite the demons argueing inside my head. Plus tends to send you into the negative, depressive, death spiral of thoughts.
My single biggest problem I believe rests in that I have no plan, no goal, no end game. For as many good reasons to transition, I have just as many if not more not to. Yet, I've essentially been doing part-time for about 1 1/2 years. If I was sure of a goal, there isn't a whole lot left for to think about that hasn't been thought and what-iffed to death already.
Once you have a goal, you make a plan and then work the plan. No more thinking, just doing.