LOCK IT DOWN
A game changer for Airbnb hosts, August works like a hightech deadbolt lock, allowing you to make temporary digital keys (with set expiration dates) for each guest ($199 at August.com). You can even create permanent codes for your doorman or the friendly FedEx guy. Sleekly designed by Yves Behar (below), August also has an auto-unlock feature, which uses geolocation to open the door as you arrive home — no more fumbling for keys with armfuls of groceries. Best of all? It requires just 15 minutes and a standard screwdriver to install.