Accountants - Nothing.

Appliance repairman - Nothing.

Auto mechanic - Not necessary. If you insist, tip about $10-20 for bills up to $500, and $50 for bills over $500.

Bagger at grocery store - Check in advance to see if the store has a no tipping policy. Most have one. If it doesn't, then $1-3 for the bagger and $1-5 for the person who loads your car.

Baptism - Nothing.

Car detailing - 15%

Car salesman - Nothing.

Car wash - $2-3 for a car; $3-5 for an SUV or large vehicle. If there is a tip jar, leave your tip there. It will be split among the workers. Otherwise, tip the person(s) who did the cleanup after the wash.

Carpet cleaners - Nothing.

Clown at children's party - $15-25 depending upon the quality of the performance and the heat level of the day. Others say 15-20% of the performers fee.

Contractors, installers, and home remodelers - Nothing. Offer a cool drink instead.

Cosmetologist at makeup counter - Nothing. Makeover specialist at department store - Nothing unless you used over 15 minutes of her time and then bought nothing.

Electricians and plumbers - Nothing. Offer a cool drink instead.

Exotic club - Nothing. Shame on you. I can't believe you would even ask.

Farriers or horse haulers- Nothing.

Financial planners - Nothing.

Graphic designer - Nothing.

Hooker - Nothing. You are being fu***d to start with.

Interior designer - Nothing.

Maids - Nothing, except at Christmastime. See above.

Mary Kay representative - Nothing.

Mortgage loan officer - Nothing.

Nurses - Nothing.

Painters (house) - Nothing. Offer them a cool drink instead.

Personal shopper or salesperson at department store - Nothing.

Pet groomers - Most pet groomers are paid based upon a commission, not a regular salary or hourly wage. Typically your tip should be 15% of the bill or $2 per dog, whichever is greater. If your dog is difficult, then tip more. Obviously, don't tip if the quality is poor.

Pet sitters - Tipping is not required, but most pet sitters will appreciate a tip. 15% is appropriate if you want to tip.

Physical therapist - Nothing.

Piano tuner - Nothing.

Realtors® or real estate agents - Nothing. The best way to say thanks is to refer people to them.

Sports arena in-seat food service - This one is tricky. At most arenas you tip the person who takes the order 15%. You tip at the time of payment, not delivery. The best thing to do is to ask before you order. You definitely should not tip both the order taker and the deliverer unless you split it.

Shoeshine - $1-2.

Swimming lesson instructor - Nothing.

Tailor or seamstress - Nothing.

Tattoo or piercing artist - 10-20% or whatever you can afford. It isn't necessary, but it is appreciated.

Telephone, security, cable, satellite, internet installers or repairmen - Nothing.

Title company closing agents - Nothing.

Travel agents - Nothing.

Tree removal service - Nothing.

Weekly lawn or landscaping service - Nothing.

Window tinting service - Nothing.