Give a man a birthday gift that he can actively use rather than anything purely decorative. Purchase tickets to a sporting event or concert, a gift certificate for a round of golf or a gift card for a favorite restaurant or bar.
Look back to the past year in the man's life to find gift inspiration. For instance, if he spent much of the year hiking, he might need new boots or a handheld GPS unit. If he has showed interest in history, pick up a set of books or DVDs about the World Wars. If the previous year was a stressful one, he might appreciate a set of luxurious sheets or a soothing foot bath that he can use to relax.