First off, is it waking you up? If so would suggest some modifications to your diet or bedtime routine. Your sleep is precious, and it is unhealthy to wake up just because of the urge to go. Personally, I find that a late dinner really affects me especially if it is heavy on the fiber, so I try to limit the salad intake at night. A rich sugary foods can have a similar impact so you should pay attention to portion sizes of ice cream, cake, pie, etc.
Second, try to hold it in until you get to work. This benefits you on several fronts; first, you do not want to be late to work with the excuse that you had to poop. Second, you can save yourself quite a bit of money each year by going at work –the average person uses 8.6 sheets per trip, depending on your diet it could be a lot more. The typical roll of two-ply has 500 sheets, so if you use 10 per trip and go once a day you can use close to 6 roles a year just on work days at 25-cents per roll you can save about $1.50 just by going at work. Finally, just think about this, if you are a wage earner your boss is literally paying you to poop in the morning, way better than going at home for nothing.
edit: opps, Morning SHIFT. shiFt. NVM