I use a conventional release (Short 'n Sweet); and lock the back knuckle of thumb against the corner of the jaw bone. Touch string to tip of nose.

FYI - most people seem to shoot a bow with a little too long of a draw length; and many people, by virtue of too long of a loop and/or a release that extends out past their hand, have an anchor point that is too far back on theirface/head IMO.