If you want length, but not the full coif, The Flow and Comb styled look works for any professional. Less douchey than the slicked-back businessman, adding length here is key. Chris Hemsworth cleans up nice on the red carpet with this style.
Do it if: Your hair is straight, and fine to thick.
Put the scissors down if: Your hair is super curly or wavy.
Ask your barber to: Give you a classic square cut, but longer on both sides and the front.
Products to pull it off: When your hair is wet, use a mousse like Sebastian Mousse Forte ($11), and comb back. Let it dry naturally.