Most software today is very much like an Egyptian pyramid with millions of bricks piled on top of each other, with no structural integrity, but just done by brute force and thousands of slaves.
If you build a car, you can only sell it once. If you paint a fence, you only get paid for it once. If you create a piece of software that's essentially free to reproduce, you can keep getting paid over and over perpetually.
I'm not really into the business of giving out tips, but if you are not using an all-encompassing software to integrate and sync your schedule, then you might be losing time. Most of these are free, and they can allow you to keep track of everything in one place and then access that from your computer, phone, or tablet.
Lauren Goode and I have agreed that the next version of the Mac software - all of them are named after places in California - should be named either Bridgeport or Warwick.
In almost every job now, people use software and work with information to enable their organisation to operate more effectively.