Maintaining focus really depends on external sources, you can practice all you want, but most of us will still be slaves to our emotions - of course, I choose to continue to practice, because the benefits are there.
As for work, if I can't get anything done - and I know that I won't be missed, I'll take off with a good book to a coffee shop and read up on the craft, without a computer in front of me. But at the same time, if I feel extra creative or just happen to solve a problem at midnight, I'll log on and work from home.
I don't think creativity can be harnessed to a 9 to 5 schedule. You have to take the moments when you can.
jeffa's guide to meditation: YMMV and will!
- lie down on your back, make sure your neck is comfortable
- don't think - take all of your thoughts and direct them to /dev/null, continue when your mind is sufficiently stable
- breathe deep - breathe fresh air in from 'the top of your head', and the stale old air out 'the bottom of your feet'
- if nobody is around - chant! as you breathe out, low and strong - sounds silly, but the VIBRATIONS in your throat will help you to concentrate and keep the chit chat away
- your head should be light and buzzing, keep breathing
- start with your feet - put them to sleep, feel them disappear
- move up your legs, torso, and arms - neck and face muscles - all completely relaxed and NUMB, but there
- your mind should now be awake, but your body is asleep - hold on as long as you can, and don't be afraid: fear is the mind killer, it will snap you back awake
Hope this helps . . .Oh yeah, almost forgot - control. Don't try to take control of everything, just let it go. I am still working on this one. :)