I can see why a lot of successful authors say that one of the secrets to their success is discipline - the ability to sit down day after day and churn out so many thousands words.
Writing leads to more writing. Maybe not good writing - but writing of some sort.
I've been pretty slack since Christmas; a lot of the reason for that is I simply fell out of the habit of sitting down each night, opening up Blogger and bashing out some words on whatever topic happened to pop into my head that day. It's not like my brain has ceased to throw new stuff at me each and every day - I just haven't parked my bum where it needs to be and plonked away at the keyboard.
Being on the bike is no different - it's not so much how many miles are done per day as the fact that you actually put rubber to the road nearly every day and do some exercise. Something is better than nothing, and if you do it often enough, you'll quickly start doing it properly and see some improvements.
Let's see if I can get back into the swing of writing nearly every day.