Practicing doing small busts sculpture everyday is a good way to familiarize and find out about new sculpting techniques and tips. I've been doing a lot of fansculpts from cartoon, comics, anime, and video games characters in my tumblr blog. Such as this Korra and Asami mini busts below. I'll post a compilation of it here soon.
So if you're interested, do visit frikimidz.tumblr.com for a more regularly updated sculpting blog thingy