Eliminate wishful thinking. Focus and TRY, even when it means putting myself "out there" and risking failure despite my best efforts.
Good position isn't achieved by "hoping" I'll get good on the next ball. And having good tip accuracy isn't achieved by "hoping" my tip will strike the cue ball within around 1 mm of where I intend.
I still fall into these traps occasionally. The table layout will look challenging and nothing will jump out at me as a good option, so I'll just send the cue ball in the general direction without really committing to a route. Or I'll get down somewhat lazily on a difficult, crucial shot, knowing I'm not 100% aligned properly, and then I'll pull the trigger before I'm fully committed to the shot anyway, compounding the odds of a miss.
I think it goes beyond laziness and is some kind of ego protection. I must subconsciously think that if I don't fully commit to challenging situations, I won't fully expose my ego/lack of skill/lack of knowledge if I mess up. I'm getting much better at this but it still creeps up on me from time to time, especially under pressure.