My only suggestion at this time is; Go out of your comfort zone?
I don't know if you usually draw animals or if it's just what you've been drawing these last couple days, but also try looking at a random thing in your immediate area to improve. Practice materials you don't usually try your hand at and play around even more with line thickness and shading!
Either way, these are my 2 cents and I'm currently sticking with it so I hope it helps a little? I'm totally useless huh :T //fail
//slinks off into the further reaches of teh interwebs.
I love your fluffy fat bird <3