Don't procrastinate? :-) Sorry, I've never participated in a blog, so I'm not sure how much traffic that will bring you. But seriously, you need to find a way to reconcile your work with your home life. Can you realistically plan the bulk of your work for during your husband's business conference times?
My husband is in the Navy- until we moved here, he had been gone 6 months out of the year, which left lots of time for sewing time. Now that he's home all the time and we have a 3 year old, I'm taking on fewer custom orders. I have two t-shirt quilts to do (for the same customer!), and that is the complete list of pending outside work. The first is due in two weeks (no problem!), and the second is due a month after he gives me his shirt selection.
So, to sum up, pace yourself! Give yourself lots of time for custom orders. Clear communication with your customers goes a long way- "I am overwhelmed" and "I want to send you my best work" are both true and people (generally) understand.