On-demand somebody to do your errands for you
Seriously, TaskRabbit will do, like, anything you need them to do. Just describe your task and pick a rabbit.
On-demand personal trainers
Let's be honest: You're not going to the gym most days, but when it's raining, you're, like, DEFINITELY not going to the gym. Handstand sends trainers to you, so you can make sure to get your crunches in when it's wet out (or, more likely, look through it while you're in your pajamas on the couch and eventually decide that's workout enough).