Others have pointed out that you need to read, challenge yourself and work hard. I'd add that this is a lifestyle change, not a quick fix - you need to treat it

Others have pointed out that you need to read, challenge yourself and work hard. I'd add that this is a lifestyle change, not a quick fix - you need to treat it accordingly, or accept that this is not something you can do indefinitely. You know those people who say "I used to ..., but then I realised that ... and now I'm much happier"? You're either one of them just on the cusp of your epiphany, or you're just wishing really hard for a silver bullet. The latter is a waste of your time. (Mine was putting the blame for my lack of achievements anywhere but my own procrastination. I realised what I was doing, and stopped by imposing deadlines on myself, and penalties for missing them. "I'm not allowed to go to that party at the weekend unless this project is finished, completely. Either that, or accept that I'll never achieve anything because I don't put in the time". Treating myself like the naughty child I was, basically.)