I disagree about tipping Uber drivers. First off - very few people drive as their sole source of income. Second, the whole point of Uber is that it be a cashless transaction. I rarely carry cash anymore, and it would be a major hassle if i had to go to the ATM just to take an uber. If they don't make a "living wage," that is definitely too bad - a lot of people face that here in Silicon Valley, and no doubt, anyone would appreciate a few extra dollars - but I think the smarter solution would be for Uber to pay drivers more. Please don't ruin a good thing by making tipping "expected" on Uber!!
If you want to tip, use Lyft - they have a tipping option on the app.

NoTip: Totally agree that the ideal solution is for Uber to pay the drivers more (take less of a cut.) But they don't do that, so until they do, it would be nice if people who do carry a little bit of cash (we are talking about 2 bucks or so) would help supplement the money that's left for the driver after gas, insurance, wear and tear on the car, lease payments in some cases. If drivers could make a couple of dollars more per trip - when they deliver a job well done - that could enable more drivers to Uber as a primary form of income, creating more stability in the driver pool, which has tremendous turnover, for one thing. What the "whole point" of Uber is depends on your vantage point. Sure, going cashless for the rider is very convenient but like many purchases, does not take into account the true cost of the purchase. Getting a very convenient, cheap ride when you want it is great but someone, somewhere is giving more than is apparent up to make this happen. It's not the rider, it's not Uber. There's a lot of "good things" that could stand a little "ruining" to make it a win-win-win all the way around. How about at least during the holiday season you fork over a couple extra bucks in the spirit of good will?

If you have a large circle of extended family or friends to buy gifts for, it can be very costly. You might be able to reduce the stress and cost of Christmas for everyone if you suggest a change in the way your family and friends give presents.