Drawing from pictures or real life and not taking more than 2-3 mins per drawing has helped me tons
After a burst of 10-20 drawings, check your favorite ones, see what you did right. Check your bad ones, see what you did right and wrong, try to make them again. If you're noticeably bad at something, grind at it like a motherfucker
For example I was bad drawing faces. So I started doing 10-20 faces 2 minutes each from pictures, then started to look less and less at the pictures. Started to draw from life. Now I've made over 500 faces and can get the idea on how to proceed on a portrait and about half of them look decent. To me none look impressive but friends and other people who are into drawing and sculpting are amazed at my progress.
But guess what, the other day I tried an acrylic painting and made hair. It was awful, tried three times and, albeit it got better every time, it ruined my whole painting. Guess what, since then I've made about 50 hairdos from people I see on the bus and now I can solve those issues almost effortlesly.
So all in all:
1) Draw a lot
2) Draw fast. Avoid fixing, do something new
3) Make lots of shit
4) Start doing stuff you don't know how to solve
5) Don't be afraid to check other artists, photos, copy, trace
6) Make shittons of stuff
The thing here is that not everything you do will be good, it's something like percentiles. 50% mediocre, 20% shit, 20% ok, 8% good, 2% 'shit how did I even make this?'
If you make shitloads of stuff you won't mind your shit drawings (instead you'll skim through it or probably even say 'at least I learned x from this') and start to appreciate your good ones. Over time your average works will be way better than your average works from months ago.
That's it I guess.