Design It Yourself: Logos, Letterheads & Business Cards

This step-by-step guide aimed at non-designers is the best book I've come across for learning how to design your own logo, business cards, and letterhead. The neat thing about it is the way it teaches you the good design theory through step-by-step examples. The "Design Recipes" section, which shows you how to use bleeding edges, borders, boxes, bursts, circles, corners, shadows, and so on, is especially useful. If you follow the guidelines here, you really can't go wrong. Link