For the man who's turning 50, receiving gift certificate to a favorite retailer will likely be greatly appreciated. Gift certificates are very safe gift options that allow the recipients to choose exactly what they want. Perhaps a gift certificate from a wine shop or a local bookstore might give the gift more style.
If the man of the hour entertains a lot, an idea is a set of monogrammed glassware or barware. Other items can also be personalized, such as a great robe, a leather briefcase, a pillowcase or a doormat. Finding something that he enjoys and then determining a way to get it personalized would befit the occasion; ties and cuff links never go out of style.
A leather card case and a picture frame are no-fail options. If the recipient were a technology lover, then perhaps he'd love an e-reader or tablet. If he loves watching movies, a movie theater gift card might be a winner. If he considers himself a grill master, then consider new grilling tools; go the extra mile by having them personalized. A bicyclist might appreciate receiving a decorative bike cover to protect it and prevent any dirt from it getting on the floors or carpeting.