Are you a fair tipper?

Are you a fair tipper? I can honestly say, yes, I am. I tip between 15-20 percent, usually on the higher side, mainly, because I used to waitress and realize how hard our restaurant servers work on a daily basis. After surfing the web, I came across an article that says a 20% tip is now the new 15%. Liz Pulliam Weston, writing for MSN Money, reports that 20% is now considered standard. She has some guidelines on tipping, which I've posted below.

Waiter/Waitress 15-20% pre-tax bill
Bartender $1-$2 per round or 15% to 20 % of tab
Wine Stewart 15% of bottle's cost (less as price rises), clearly earmarked on bill
Room Service 15-20% of pre-tax bill
Valet Parking $2-$3 when car is returned
Taxi Driver 15% plus $1 to $2 per bag for help with luggage
Hotel Bellhop $1-$2 per bag
Hotel Maid $2 per night, paid daily, clearly marked "housekeeping"
Skycap $1-$2 per bag, $2 minimum, in addition to any fee
Hairdresser 15-20%
Manicurist 15-20%
Spa Services 15-20%
Food Delivery 10-15% with $2 minimum
Golf Caddy $20 or 50% of the caddy fee, whichever is greater

Liz Pulliam Weston continues:

But what if you get lousy service? Peter Post, of the Emily Post Institute, is quoted in the article as saying if he experiences bad service he caps his tip at 15%, then talks to the manager about the problem. "Not tipping doesn't correct bad service," Post says.

Stiffing is also a bad idea because:

The poor service you go may have been beyond the wait staff's control, such as problems in the kitchen.

The federal minimum wage for tipped employees is $2.13 per hour, so wait staff depend on tips to earn a living wage.

Weston writes that if you don't want to tip because you consistently get poor service at restaurants, consider whether the problem might be you.