to tip or not to tip

I (am so excited) have an appointment tomorrow to get my nails done. NO Solar Nails for me- I was inspired by Betsy to try OPI's Axxium Gel nails.

I also have to go get my jumpsuit for the wedding tomorrow afternoon.

I also have one of the ladies from The Perfect Face coming on Saturday to make me pretty for the wedding...

So here's my question:

Who do I tip, and who don't I tip?

{photo courtesy: esquire}

I always tip the nail lady- but they won't be doing as much work on my nails as they do with the Solar Nails. I will tip, but how much is enough?

I don't think I need to tip the seamstress- after all, I am paying her to do the alterations. Thoughts?

The makeup lady... this is the one I'm stumped on. I'm paying them to come and do my hair and makeup. I'm paying a little bit extra for the "driving distance." Okay, a dollar extra. Um. Do I tip? I don't know. I think we tipped them when they did the hair and makeup for my wedding... but they did me and my girls and the mommas. If I tip- how much? Help?

I have to say: typically, I am a wiz with this stuff. I have a very strict code: If I am a regular patron of a restaurant, I typically tip fairly well. If I'm not a regular patron, and the service is good, I tip well. If the service is mediocre, I don't tip very well- but I always tip.

I always tip Steve, my hair stylist, very, very generously. The power is in his hands- he can make me or break me, hair wise. I always tip him like the champ he is.

What do you think, oh readers of mine? Who do I tip? Who don't I tip? How much do I tip?