My method was to develop a detailed daily "planning" calendar, showing all appointments, tasks, procedures, everything I could think of that was on the path to getting it done. Once I had "The Plan" I just forced it out of my mind, only focusing on the very next step of that plan. I made it from early December to February 28th (surgery day) that way. I just forced my focus onto my life, and lived my life as if the next step wasn't there until it was time to do it.
We're all different, I know. What works for one may not work for another. The main thing for any of us to do is to realize that once we've made the Big Decision, it is out of our hands. We have to then believe in our care team's abilities and, if we so choose, in the One Above, to carry us through the journey. We'll be here with you, just as so many others were here with us when we took our own journeys.