"Doing it badly is doing the thing."
This one works for me, and I've learned it from a post on HN. Whenever I feel stuck or overthink how to do something, just do it first - even with all the flaws that I'm already aware of, and if it feels almost painful to do it so badly. Then improve it a bit, then a bit, then before I know it a clear picture start to emerge... Feels like magic.
"When in doubt, use brute force."
Except you do this in a corporate setting and they will stop you the second it works. And then you are stuck maintaining a barely working version forever.
I learned this the bad way, but now I just lie and say it doesn't work until it's good enough for me
"Everything worth doing is worth doing badly."
Got me through many a rough spot.