Keep it up.
The first rule I ever assigned myself as an artist is to always carry a sketchbook, which I have since 6th grade. The trick is to always work in that book. For the last seven months or so I havn't done much as far using my sketch book for sketching. I wrote ideas, scribbled done dates and names, even phone numbers and funny websites. Seven years ago I filled a sketch book with drawings every month- on average 3-10 sketches a day. I really miss that feeling, plus having all the prep workl started is always nice when approaching a blank board. Soon I will be embarking on a new project, which should help me get back to my doodle glory. I fucking hate feeling nostalgic.