Valet: This one was news to me. Don't drop cash to the guy who opens the car door or brings the car to the valet lot. Instead, pay the guy who brings it back, generally $2 to $5. I've been overtipping on this one for a long time.

Bellmen: These guys carry bags, so they're earning their tips. Give 'em $1 to $2 a bag, more if you pack for a weekend like you're moving in for a month. Heavy bag, as well, warrant an extra tip.

Maids: Once upon a time, maids were only tipped if you were staying for the long term. I guess this has changed, and you're supposed to leave $1 to $5 daily. But, if you've been tipping valets for both drop-off and pickup, this should be break-even for you.

Concierges: Don't tip for the basics. If you're asking for directions, recommendations or simple answers, those are free. Did the concierge score hard-to-find tickets? A table at an impossible restaurant? Pony up: $10 to $50. Nonetheless, it's your call. Vivian Deuschl, a vice president at the Ritz-Carlton chain, says that you should expect fantastic service, "There is no obligation to tip."

Skycap: Pay for help when you check your bags curbside: $2 to $3 a bag is fine. If you have a lot of bags, throw in a little extra, a good rule to apply for the driver who takes you to and from the airport, too.

And, here are a few others ...

Service matters: Tips are provided for the service you receive. If you receive unacceptable service, don't offer a tip. But, if service is so bad that you aren't tipping, it's probably a good idea to call a manager and give your side of the story. First, it will keep you from getting shafted by other hotel employees when the word spreads. Also, it will alert the management to a problem with the staff. Be thorough, and don't whine.

"No tipping" is sacrosanct: Some resorts have no-tipping policies. They always make it very clear up front. Also, they will tell you if there are any exceptions. Curtain Bluff, in Antigua, doesn't allow tips and makes alternatives clear (there's a charity on the island). The spa is a "tipping zone," however, and the front desk will let you know. If you try to tip in a no-tip hotel, the employee will probably let you know, but it's best not to create the awkward situation at all.

Special requests: Think beyond restaurant reservations and event tickets. If the concierge does the impossible for you, shell out for it. I'm thinking of several super-luxury favors I've heard (sorry, can't reveal them) from industry insiders. If you're rolling in the big leagues, don't bother carrying singles; you'll need Benjies.

Be realistic: Tip what you can afford. You don't need to toss around boatloads of cash that you don't have. It may feel good to be a big tipper, but the high you get now will hurt like hell later. Remember that you'll need to live with the financial situation that you create while on vacation.

Don't tip from guilt: You don't have to solve the financial crisis on your own. The recession has led to a travel industry slump, which means hotel employees won't be making as much. Think of it this way: these guys aren't buying more of what you make just to help you out. So, don't think you need to return the favor.

Know your environment: There is a lot of mileage between Eden Rock and the Holiday Inn: don't expect the same tipping strategy to work at both locations.