Hello, are you still reading this?
I read your post a few days ago, but didn't reply because the main thing to do when running a business and having a baby (or 2, 3..) is to avoid idling :-)
It made me laugh when you wrote that you are trying to reign in your ideas... that would never happen to me ;-) I was more the opposite: forcing myself to be less consumed by my pregnancies...
But anyways, here goes:
I keep any leisure activities to a bare minimum.. especially really "mindless" stuff like TV, surfing the net looking for nothing in particular, reading rubbish mags etc you get the idea. That's the stuff I'll have to do without.
For the rest, I prioritise. In my mind life is sectioned into different compartments: relationship, kids, work, hobbies (well, I guess your work is often your hobby when having own business, so you kill 2 birds with one stone), sports, friends, leisure, housework, rest, etc... so I feel that I cannot give all of them the same attention, because there's only so many hours in the day.. so some of these just get dropped. (Hint: Relationship is an important one ;-)
With my last baby I worked right up to when she was born (came a month early...) and I wasn't prepared at all... that was stressful, and I wasn't able to instantly "bond" with baby... but I made a special point of bonding once I realised this and no harm has been done when you look at the big picture. But I should've had a bit more time to "be still" and look forward to the baby etc... I think that way you can bond "immediately"..
Running a business and having children?
Get yourself a notebook (if you haven't already) and write down your ideas. They don't need to be implemented asap...
Get systems in place that everything is planned to run smoothly (instruct your PA - what a fantastic opportunity)
Rely on others and become really good at delegating.
Keep clutter in your life to a minimum.
You definitely need childcare in place. If you can afford it get a nanny.
With your own business it might be unrealistic to take six months OUT (depending on the sector you're in), but really block out chunks of times during the day when you will be just with baby, without mobile, email etc, and just work through 2 or 3 hours a day dedicated to work for the first few months.
Set some time aside each day now to relax and prepare for the birth.
Maybe think of your worst case scenario that could happen to your business... it helps me to actually relax because the fear has been "named".
I think what the other posters wanted to say is that things might not be always perfect, but that is fine. (and many new Mums "lose their marbles" a bit, but that happens because of the hormones, not because they are running a business). I try to lighten up and have a good laugh, then I feel better.
Good luck, and don't forget to put your feet up!
Let us know how you are getting on.