Well you can use a battery operated razor or a disposable razor. Personally I use a disposable razor. If your pubic hair is long I would trim it first (with trimming scissors) so it's manageable and you can shave 'down below' easier.If you are using a new razor then I would be very careful because you can cut or nip yourself easily. The good thing though about using a new razor though is that you get a closer shave and it leaves 'down there' smooth.
My Tips:
~Use shaving cream or gel - choose non alcoholic and non scented shaving cream or gel.
~If the skin is irritated or red do no go over it again - it will just get worse and it hurts!
~Before shaving make sure you are wet, in the warm water to soften the skinand relax the hair follicle.
The thing with shaving 'down there' is that you have to have frequently because the hairs grow back fast and it can be stubbly. PersonalIy I just wait until it grows back to the way it was before I shaved it or if it grows back and it irritates/itches me 'down below' because it has grown back and the hair annoys me, then I shave it again.