I discovered this post from over a year ago. It's still relevant so I'll post it here.
It's surprising how quickly drawing can become a chore. I have talked before about the importance of keeping your drawing fun. I think all too often as an artist you can get into a rut of drawing when you are tired and quickly associate the two together. I think it's important to draw at different times of the day in different locations. To achieve this you will need to carry your sketchbook around with you wherever you go. There is always small moments where you can be drawing, waiting for an appointment or bus for example. All too often we reach for an electronic device to fill those small moments, however if you are an artist, you can easily bag these times to do a quick sketch.
You also need to find a way to draw that is natural to you. This sounds obvious and easy and if you aren't paying attention it might seem like this would be impossible not to do. I have found it is to easy to fall into a pattern of trying to draw like others or even just trying to draw like you think a drawing should be. Try to let go of preconceived notions of what drawing is, or further more what sort of drawing you can even do. Drawing should be challenging but it shouldn't be hard, if it's hard you are approaching it from the wrong angle. Drawing should be a joy, each drawing enticing you to create another drawing.
Anyway I'm not sure if any of this makes sense or not but I feel like it has helped me recently.