Don't!
Focusing on the virgin, not yourself (this also applies, if you're both virgins).
Don't expect yourself to get anything out of it.
Don't rush it.
Don't push him/her into doing it if he/she regrets halfway through
And now, assuming that the virgin is
female:
Probably the best thing is to make sure that she has an
orgasm even before your start
sticking your
Big Willie into her. There are multiple ways of achieving this - think of one yourself.
Furthermore, as always, when you fuck, give her the
control: Lead her
hands down to be able to make
space for the
thang. And let her come on top of you.
But in general, the top advices should do:
Keep calm - and don't forget to end it all with a nice
"oh my god i'm coming" face!