Good b/w can be surprisingly hard to do with Photoshop. A plug-in can help
(CLICK FOR FULL-RES)
Each of the Global Adjustments on the right side of the screen have sub-adjustments. Click the triangle next to each to fine-tune. Begin with Brightness; Dynamic Brightness allows you to brighten or darken your image while maintaining overall contrast range. Move the sliders to adjust the brightness levels of your highlights, midtones, and shadows.