A few years ago I wrote about a then-new application, Trip Mode, that allows you to turn off the Internet pipes for particular apps on your MacBook. It's a great idea, particularly if you tether your MacBook to your iPhone or iPad. Using Trip Mode, you can turn off data hogs, like Dropbox and iCloud, so you don't unknowingly burn through all your mobile data the next time you tether to check email. It's been a few years since I first covered Trip Mode and thought I'd take a moment to say this app really sticks. I'm still using it … often. I've also started using Trip Mode on my iMac when podcasting to keep apps like Backblaze from using up bandwidth while I'm on mic. (I learned that trick from my podcast partner Jason Snell.) Anyway, if you ever tether your Mac, get Trip Mode.