Good b/w can be surprisingly hard to do with Photoshop. A plug-in can help
(CLICK FOR FULL-RES)
Unlike in Photoshop proper, you don’t need to create masks to do selective adjustments; using Control Points, the program finds the edges for you. This model’s skin could use just a bit of brightening, so zoom in on her face, then click to add a control point to her skin, being careful not to apply it to any area with makeup. Use the top slider to decrease the adjustment circle so it encircles just her face; the app will use its tones to find its edges. Now move the Brightness slider to increase the brightness of her skin.