Also as far as things to draw goes, https://twitter.com/Pixel_Dailies is a favourite of mine, gives you a new theme every day and you can always go look around at what people are posting/drawing, and you get an excuse to draw something, no need to commit to doing it every day or even to submit your work but the inspiration is pretty nice already :)
Plus it constrains you away from spending forever on things: https://bp.io/pd