Writer's block doesn't 'hit me' so much as I allow myself to succumb to it. With my schedule, I have a limited amount of writing time set aside each day. When I sit down at the computer, it usually goes something like this:
1) Check three email accounts. Two are not very active, personal accounts. The third one is the biggie, where I get all my editor/publisher/important stuff. That gets attention first.
2) In another folder of my busy email account, the loop messages and digests from over 50 Yahoo groups (that's way down from the past!) sit waiting for me. I scan those, answering the important ones and deleting the stuff I can't take time for. Depending on how much important stuff there is, and the level of my patience for rating what's important and what's not, steps one and two could take from 15 minutes to an hour.
3) Open the file to my current work in progress. Reread the segment I wrote previously. Suddenly remember that I meant to look up online the names of some baseball players in the mid-nineties for current WIP. Surfing for those take another 15 minutes.
4) Names copied and pasted, I return to WIP and begin to write. An hour of my allotted two hours is already shot, but I'm ready to dig in. I realize I've used the word 'looked' too many times and go online to the Thesaurus to come up with something different. Spotted. Excellent. Back to work.
5) I see Jude come online via Instant Messenger. I should stop and talk with her a minute about some important edits/proofing/
Okay, this isn't so much about writer's block as it is procrastination, but it's something I deal with every day. Finding a balance between life, writing, promoting and the business end is tricky, but lots of people do it and I usually do, too. Some weeks are tougher than others.
True writer's block usually hits me when something serious is going on in my real life. It's hard to flip a switch and put it out of my mind. I can usually do busy work, though, and try to use that time to catch up on small stuff, website work, promotions, Spider Solitaire, etc. I've even skipped over sex scenes and written other parts of a story when my mind wasn't truly into the act. Works for me.
Lisabet is correct that if you want to be a writer, you have to just write. I'm fairly prolific, so I guess I do a decent job of it. But there are days when I think I'm all set to write, and I end up spending an hour putting widgets on my blog. I suppose it happens to the best of us.
I've started logging words written on a daily calendar, so I can see if I'm making progress or not. Last week I wrote 7,500 words. And found the most amazing Jack-O-Lantern for my website header! http://www.jennabyrnes.com/mainpage.htm *grin* Balance in all things, I guess.