I look at the stuff other people are posting on Instagram and Tumblr and I'm blown away that these are their "practice" work. Yikes! I try not to be intimidated by that and just keep going. Some days I sit in front of the TV and just do a page of line drawings (badly) of whoever's on TV. Some days I paint.
Sometimes I'm happy with the results, sometimes not so much but it's all practice. I've been posting each day on Tumblr if you're interested in seeing the full size photos.