1. Car trouble
Whether it's flat tire or you just need your jumped, call an Uber or Lyft driver. For they will most likely get to you quicker then roadside assistance will, and most will be willing to help. Just make sure to tip them good or give them permission to complete the trip.
2. Deliver or drop off items
Not needing a ride, but needing to get something to a friend or family in town real quick? Request an Uber or Lyft and ask your driver if they'd be willing to deliver a small value item for you.