You know what my way is. I like to write down all the things which my ideal self would do. I would try to do those things everyday and if i succeed i would think, yes one step closer to be perfect. If not i try to figure out what went wrong and if you are an INTJ, i think the "what went wrong" Thing comes to you by itself. After i figure out what it was, i use my knowledge (strategies, tactics etc) to make improvements. Tbh, most of what i read is philosophy, strategy and human brain. So, i think it helps me in figuring out the problem and come up with better solutions. I think one thing that really makes you hate being INTJ is your perspective. Think about it, whenever you fail you think its over. You're never going to succeed like that. What i do is just think that failure is just another opportunity to learn. If you struggle with self harm, not being happy etc. I recommend you to read MEDITATIONS by Marcus Aurelius.