When Work and Creativity Collide (aka My Work Side is a Bully)

I have a problem.  The part of my brain that deals with work stuff - finances, marketing, spreadsheets, etc. - is a bully.  When it's on, it grabs hold of the part of my brain that deals with creative stuff, smacks it around, and shoves it into a locker. 

I hadn't really thought about it before, but I suppose, looking back at it now, it's been a problem for a while.  I try to separate the two by doing work stuff in the daytime and creative stuff at night, but it doesn't always keep the bully in check.  Sometimes if I spend a lot of time on the work stuff during the day, I'm too beat up to let my creativity side play at night.

Not sure how to fix this.  I mean, I probably need to put my creative side on a regimented exercise plan ala Jack Lalanne, so when the bully side gets uppity, the creative can hold its own. 

I don't want to shut down the work side completely.  It's the side that makes me money.  But if all I have is the work side, I don't produce more product to make money with.  I'd love it if I could find a balance somewhere, make the two sides play nice for a while.  They need each other, after all.

I suppose I should just shut up and get 'er done.  Pull the creative side out of the locker and push it to stand up for itself. 

How about you?  Does your work side bully your creative side?  Vice versa?