Honestly, it's got the same fix as writing: If you don't challenge yourself and don't do new things then it won't be fun. Do the things you want to do; do the crazy experiments or splashes of colour that are still way beyond you but are fun anyway. Draw something funny!
Be passionate about what you do, whatever you do.
Join the ATG; ponies, daily themes, and deadlines. It's got me to get off my ass and produce four fully coloured and backgrounded pictures in a row.I was getting really sick of myself not finishing the Medium series. Being a melodramatic douche I've been kind of considering simply not updating til it's done, but that will probably take a preposterous amount of time.
Light is finished since three weeks ago, for the record, and I just haven't broght myself to upload it and I'm honestly not sure why.
(Siuis, thanks a million for the criticism. I will respond to it in full at a later point and would very much like to hear your opinion on the rest.)