The secret to doing something well is to do only just one task.  If I were really smart, I’d narrow my interests down to doing just one thing: I should really choose from among cooking, gardening, and my other hobby and focus on just one aspect of that.  I could become a master rosemary gardener, for example, or I could learn how to make truly exquisite lasagna.  I am, however, content to be less than the greatest at something--and, actually, that sort of brilliance tends to lead to recognition which I shun, shun, shun--and my trio of vocations have a synergy to them, so I remain a multi-tasker.