12/ It's Crafty Time
Aside from a mancave, how about a craft room? This will make a great place for you to let your imagination run wild. Don't forget to pick up some materials at your local craft stores. Once you're set, start painting, sewing, or doing whatever else you want.
If you believe in the quality of your product, you can even start a side business selling your crafts. All you have to do now is tap into your interests and abilities and get creative. You might discover that you're building a solid business from just a simple hobby.