Here is how I go about it. First, decide how brave you are going to be. Are you going to leave all done up, or do you want to change back to male before you leave?
Decide how secret you want this to be - would you care if your next-door neighbor sees you? Or would you feel more comfortable in a nearby town? Or would you not care if the whole world knows and sees?
Once you decide how and where (generally), it is time to start your research. Look through your local Yellow Pages, pick out a few salons that look like they might suit your purposes, then it is road work time. Go see the physical location of each salon. Are they stand alone businesses? In a strip mall? Or located in the middle of a busy shopping mall?
Now that you have narrowed your list down, there are two ways to approach this. One is to just start making a few phone calls. You might have to practice this a little Ask to speak to the manager or owner, do not explain what you want to a receptionist. Carefully explain what you want, and do it in a manner so that they know you are a safe, serious client. If you have special concerns, like a private room or after hours services, ask about that. The important thing is to let them know you are not some weird fetishist.
The other way is to go in, but get some normal male services (haircut, manicure, pedicure) but what you want to do is twofold: check out the personnel there, see how they interact with their clients, are they "male friendly", how are their personalities, etc. If you feel comfortable there, then start going in often, let them see what a great friendly person you are - then when you are accepted there, bring up the part about a female makeover. If you wait until October, then Halloween is always a great excuse (which is how I got my very first big head-to-toe salon makeover).
Now, this is very very important! These girls at the salon, this is their work, their profession. Handle yourself with diginity - do not waste their time with strange fetishist requests ("Can you tie me to the chair as you do my hair?"). Remember to be respectful of them AND any other customers that may be in the salon. You may not care if anyone sees you, a male getting a female makeover, but that little old lady who has been going there for 30 years might take exception.
OK, how is that for a start That is the basics, I can give you some advanced tips if you need them.....