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Neon bar signs make classic man cave décor, as do old-fashioned liquor ads and traffic signs with funny messages or images. You can buy these from specialized stores or online, so there's no need to look for one that "just fell off the truck." You can also search online for "man cave decorations" or "man cave signs." Display posters of your favorite actors, athletes, or anything you like. Frame your favorite movie posters in lighted frames, or negotiate with other people in your house to move a couple pieces of wall décor into your cave. Posters of models are another classic man cave decoration, although they can be a sore point for some spouses and partners. Hang up your medals and place your trophies proudly on the top shelf. If you hunt, fish, or play sports, display your equipment, along with photographs of great moments. Your man cave is also the perfect place to display any collection you have, or at least the most prized examples. There should be plenty of small things for you and your mates to grab during the lull in TV, audio, or video game activity. Include such items as:  Magazines and books 3D puzzles, handheld games and toys, and other small time wasters or challenges Strange gadgets, flea market deals, and other odd, interesting stuff you've picked up — especially if your family won't let you keep it anywhere else!
Add signs to the walls. Put up posters or artwork. Display your trophies, medals, collections, and memorabilia. Keep reading material and gadgets on hand.