Usually, half the time of doing any activity is the set-up or clean-up. So today's tip: batch it—collect up a group of similar activities and do them all at the same time.
Here are some ideas:
Buy multiple lunch boxes and pre-make lunches for the week on Sunday.
Buy a stash of kid birthday presents and wrap them all, so you can grab and go to the weekend kiddo birthday parties.
Designate a day each month to look at your social calendar and book all date nights, play dates and activities, so you can be on auto-pilot the rest of the month.
Block off two 30-minute times on your calendar daily to answer emails. Try to stay off otherwise.