Bear in mind: Large or bulky items, like a golf bag, warrant an extra dollar or two, says Holona Ochs, a coauthor of Gratuity ($33, amazon.com).
2 of 12Ryan McVay/Getty Images
The gratuity: $1 to $2 a bag (from car to room).
Bear in mind: If your suitcase is on the heavy side, tip an extra dollar, says Patricia Rossi, an etiquette coach based in Tampa Bay, Florida.
3 of 12Yellow Dog Productions/Getty Images
Camp Counselor (Day or Overnight)
The gratuity: If a tip is permitted, up to $10 a week. If it’s prohibited, just write a thank-you note.
Bear in mind: Read the parents’ handbook distributed by the camp to find out if tips are allowed and whether other support staff, such as bus drivers, are covered by the policy, says Marla Coleman, a spokeswoman for the American Camp Association, an accrediting body.
4 of 12Jamie Grill/Getty Images
The gratuity: 15 to 20 percent.
Bear in mind: If your pup is rambunctious or if she receives a special clipping session, tip an extra 5 percent.
5 of 12Thinkstock Images /Getty Images
The gratuity: Up to 20 percent of the bill.
Bear in mind: Tip if your pooch is exercised for a week or more, says Elliot Silver of DogWalker.com, a network of dog walkers.
6 of 12Chris Ryan/Getty Images
Food Delivery (to Sporting Event or Vacation House)
The gratuity: 10 to 15 percent.
Bear in mind: Ordering for a small army? Add another 5 percent.
7 of 12Juice Images/Getty Images
Gardener or Pool Cleaner
The gratuity: $20 to $50, or the cost of one visit.
Bear in mind: Give the tip at the end of the summer.
8 of 12Alistair Berg/Getty Images
The gratuity: $2 a night at a budget hotel; $3 to $5 a night at a higher-end hotel.
Bear in mind: Even if you stay for a week, tip daily, as the crew can change. Be sure to include a few additional bucks if you have a family the size of the Brady Bunch.
9 of 12Janis Christie/Getty Images
The gratuity: Nothing.
Bear in mind: Instead, “bring something back from the place you visited,” says Rossi.
10 of 12Thinkstock/Getty Images
Seasonal Sports Instructor (Swimming, Tennis)
The gratuity: Nothing.
Bear in mind: You are paying for the sessions with a professional instructor, so a tip is not expected.
11 of 12Cultura/Zero Creatives/Getty Images
Shuttle-Bus Driver (Long-Term Parking)
The gratuity: Up to $2.
Bear in mind: Compensate the driver if he waits for you, helps with your luggage, or gets you to the lot quickly, says Lizzie Post of the Emily Post Institute.
12 of 12Floresco Productions/Getty Images
The gratuity: $1 to $3 in towns and small cities; $3 to $5 in large cities.
Bear in mind: “A large SUV is more difficult to park,” says Ochs. “So give the attendant a bit more for his trouble.”