We always tip in restaurants, etc., if the service is good, but never have service added to the bill. If service bad, no tip. At my hairdressers, I give Lottie a tip but I know she will share this with the girl who shampoos, too. They do a very good job and are always cheerful.
This year we will give postman a bottle of wine (he loves the vino) as he is so helpful and friendly, popping in to see how the work is going on the new build, etc. Dustmen have been marvellous, take everything we leave out (which, with the new work has been quite a bit!), so they will get a Christmas box, too. We also have a very cheery coalman, so DH has stated he will be giving him something extra next week. It's lovely to have your efforts recognised, and we do genuinely appreciate all their extra work.