Razor Crack is perhaps New Hampshire's most beginner-friendly aid climb. It climbs an undulating thin crack through corners, a roof, and a face above. The number of fixed pins and easy placements make this a great line on which to learn the rudimentaries of aiding.
On the right end of the giant roofs, locate a thin crack with some pins in it. The first pitch, and a short one at that, climbs up to some fixed webbing right before the crack splits a roof. Many stop here and lower down. If you choose, continue out the roof and up the face above.