The concept of 'sharpening the saw', which I (rightly or wrongly, but it works for me) take to mean taking time to stop and think alone about where I am with a [usually work-related] project/mission/goal, draw a line under progress to date, and think about where I'm going now and what's most effective at this stage given present circumstances. Related is the phrase "Plans are worthless, but planning is everything" (attributed to US General MacArthur). Take time to stop, recap, take stock, and plan your next moves. Refresh your thinking.
The other model/technique I've used successfully over the years (or, at least, I think it contributed to the successes, but it's difficult to say with certainty) is affirmations, as brought into common discourse probably most effectively and controversially by Scott Adams of Dilbert fame.