there is a guy, on youtube and deviantart by the name of mikeinel. I dont know if you know this guy but he is amazing at drawing..
When ever I feel like I cant draw, or get stuck, I go to his youtube account and just watch his videos. Thats enough inspiration for me. The video that really got me serious with drawing was one he did a year ago, Fast-Paint: I Wiish. With that video, I knew If I wanted to get better, I would have to put my heart and soul into drawing then he make a new video that really got me going, Draw with Me.
This video is what keeps the fire burning for me, and I hope that It helps all of you the same way it helped me