I don't really know if this counts as wisdom, it would certainly be unusal for me if it was, but anyway...
I think one of the most important points of coming out is that you only do it when you're ready to come out and when you feel 100% comfortable about it, you should never feel pressured to come out just because you "have to", you should WANT to come out because you feel the time is right and you're okay with doing so.
So if you don't quite have the courage yet, maybe put it off for a bit until you do, or if you want to start then you could just.. drop hints that you're gay so that people might slowly catch on (easing them into it), i know i never really came out to my first group of people, i just confirmed what they all already thought anyway.
When you DO come out, i think it's always best to do it face to face, i don't go with all this "write a letter" etc stuff, i think it's important that you're there to answer any questions that they will probably want to ask you, and you also need to be prepared to answer those questions too, however much you don't want ot.

I'd also not make too much of a big deal as you do, make it casual, as if it's just some thing, after all, you're still a normal guy you just happen to be gay, no big deal.