A number of years ago, I wrote an article about traps writers can easily fall into. It's been published a number of times, mostly because I think it served as an awakener for writers. We want to do all we can to keep learning and improving our writing, but every one of the things we do in that respect eat into our writing time.
Just a few of the traps we encounter are joining too many writers' organizations, reading far too many How-To books about the craft of writing, attending myriad conferences, getting caught up in research and overdoing time spent in critique groups.
Every writer needs to step back and make an objective assessment of these areas. Make a priority list and do some cutting back if need be. I hope that Writing Time is number one on your list.
If you would like to read the full article on traps writers fall into, go to http://www.longridgewritersgroup.com/rx/st03/kopp.shtml There you'll find more detail and quotes by several writers whom I interviewed for the article.