Delegate!

The more menial stuff, that is. Especially the ones which take a lot of time away from the more important work.

When you have all the time in the world, it's okay to multitask and do everything. But when the time comes when 24 hours in a day is not important, it may be better to just hire somebody else to do the job that require less of your attention, especially if such a job is either not your expertise or something that you'd rather not be doing.

For example, I'd rather not stress over the nitty gritty of tax preparation, so I hire retainer accountant to do the job for me. What I simply do is submit the required information and paper to my accountant and she does the rest -- process the papers, compute the needed taxes, go to the BIR at the right date. Less hassle and less need for eye cream for me in the long run. And of course, she does it much better than I do, so it's money well spent.