My three Reals, two col Pesos, 5 Sols, 38 baht, and 100,000 colones...
1) Never ever go on a trip without shaving the night before.
2) If you've never done it before, you will thign what you have been looking at all these years looks bigger, I'm sure they will think so too.
3) It feels so much cleaner
4) Almost everyone I know who does it continues to do so
5) No need to keep it perfect, I go back every 3-4 weeks or so
6) Don't use aftershave unless you want to do a funny dance
7) Use a fresh Mach 3 type blade, I woudln't go with a disposable.

I would cut with small scissors to get the vegatation managable before going to work.
9) Do it at someone elses bathroom so you don't phuck your shower drain up
10) The girls like it much much better, it's just cleaner
11) I've always had very positive responses
12) It's just nicer to watch go in and out in those Termas mirrors
13) I don't ever go with shaving cream.... soap is fine, it doesn't have to be perfect ya know...
14) be carfeful, get used to it. It's not nearly as hard or as dangerous as it may seem, I can do it very quickly now
15) Bringing an electric razor to that area is like using a bobcat to level the sand in your nephews little turtle sandbox, you will destroy everything, just don't do it
16) Be careful if you have a novia stateside, don't get into a pattern of freshening up down there every time you "go away on business" or go fishing (take a boatride and change your outfit 3 times and take pics)... make sure to make it seem like a routine.
17 ) Any questions?/
I'll even take it a step further (I'm about to win the award for least heterosexual post of the day)... but I even (only twice) waxed my chest... the girls LOVED it in Brazil, but the feedback from civilians stateside was that I had problems... so I can't do it right before the trip. NOw that does hurt, but it's over and done with, but it just feels really clean and the feedback was good...