I realize this is premature for many artists, but as soon as you can afford to delegate, do so. There's a quite well known artist I know who still makes his own runs to the post office and puts mailing packets together. At his prices, he should be paying someone to do those things - or delegating to family members.
I don't have family at home, but in order to maintain Stroke and work the hours I do, I have to have a part-time assistant and a housekeeper. Of course, it does make for a rather one-dimensional life.
A lot of career people hold onto tasks that could be given to someone else. Just always keep in the back of your mind the concept of delegating and in the future you'll catch things you might otherwise miss.