Do not let up.
The recipe is a sustained attack.
Make it one of your rules: Persist without exception.
I mean, there are much worse things you could commit to.
If you are discouraged and not making the progress you want – give it a little time.
“It’s like chopping down a huge tree of immense girth. You won’t accomplish it with one swing of your axe. If you keep chopping away at it, though, and do not let up, eventually, whether it wants to or not, it will suddenly topple down. When that time comes, you could round up everyone you could find and pay them to hold the tree up, but they wouldn’t be able to do it. It would still come crashing to the ground…. But if the woodcutter stopped after one or two strokes of his axe to ask the third son of Mr. Chang, “Why doesn’t this tree fall?” And after three or four more strokes stopped again to ask the fourth son of Mr. Li, “Why doesn’t this tree fall?” he would never succeed in felling the tree. It is no different for someone who is practicing the Way.” —ZEN MASTER HAKUIN
–Robert Greene, Mastery
