The question can also be parsed into a cluster of overlapping prompts, some of which transition into general efficiency:

• Learn how to do a single task faster.

Ex: Touch typing. Keyboard shortcuts. Find a shorter path. Automate bills. Use a flashcard program like anki.

• Figure out how to do a task less frequently (minimize "in-between" time, set-up and tear-down time).

Ex: Learn what items you can buy in bulk. Cook in larger quantities. Schedule errands together.

• Identity something you can stop doing, or do significantly less of at modest cost.

Ex: Procrastination? Apply the 80/20 heuristic? This category is probably quite personal.

• Learn how to better schedule or overlap tasks.

Ex: Learn to cook multiple things at once. Learning to schedule errands at low-traffic time. Listen to an audiobook, or call a friend, or practice singing, etc. while doing mentally undemanding things like chores.

These probably aren't the best ones out there, just what came to mind easily:

• For people who take a few different medications, those weekly pill box things - it takes less attention to do it all at once when non-groggy.

• Keeping one's workspace clean and organized might be an example; a lot of people say they can pay attention more easily when things are clean.

• Keep bicycle tires well pumped - makes you go a lot faster. (Also, having the correct kind of tires. Mountain bike tires are slow on pavement.)

• Set up the computer/browser to automatically open the tabs/programs you use the most. (I know some people who do this on their work computers.)

• "no 'poo" hair washing makes hair less oily so you need to wash it less often. Also cheaper. (baking soda + vinegar is the usual method.)

• buying two weeks' worth of groceries at once so you don't have to shop as often

• Dvorac and other alternative keyboard layouts

• email inbox automation things (I've not used any, but people seem to like them)

No specifics, but xkcd has a nice chart on how much time you should invest to automate something.