What tool or equipment investment most improved your crew’s efficiency on job sites?

We use a lot of different tools that make things more efficient so we don't have one - the main thing is if you need a tool, don't buy the cheapest one. Obviously not everyone can afford Festool everything but don't buy RYobi's for a quick fix. If you have to get a duplicate tool, try to get a different one that will perform the same function so you just don't have two of the same tool. (Like if you already have a 18V Milwaukee, get the 12V one) Probably the most efficient thing we've done is gone away from company pick up trucks to sprinter vans. They are so much more efficient. 

For house cleaning-Pro-team backpack vacuums are a game changer! Worth every penny! Also, th o-cedar spin mop is fast and does a good job!

Hart 40v weedeater was a game changer for me

In my opinion and industry (residential and commercial painting) a powerful and efficient airless paint sprayer is my bread and butter. This will save time, determine quality and productivity. Now of course the paint that we use must also be of quality and grade. 

Couple things that were game changers for us:

Festool dust extractor and sander, can’t beat the dust extraction while sanding, then switch to the cleaning set after complete operation done for the day and clean up. 

Milwaukee M12 installation driver. It’s strong enough for anything I’m doing in my line of work. And it’s good on battery life. I just keep a spare battery on me. Plus the feel of it in the hand is sweet. 

a good laser level. I just switched to a Heupar laser after my cheap Toughbuilt one died on me. A few projects without it proved how much I enjoy using it.