There’s a lot of space above the shelf in most closets. Even though it’s a little hard to reach, it’s a great place to store seldom-used items. Make use of this wasted space by adding a second shelf above the existing one. Buy enough closet shelving material to match the length of the existing shelf plus enough for two end supports and middle supports over each bracket. Twelve-inch-wide shelving is available in various lengths and finishes at home centers and lumberyards.
I love a good shop tour, but it’s super motivating to me to hear you say that you built it all in a few years on good old-fashioned hard work. About 8 years ago, I lost an office job and began working with my hands, first doing siding and windows, and now installing home media systems. It has completely changed my work ethic, and my motto now is, “If you ain’t sweating, you ain’t working.”
Woodworkers are a social bunch, and there are a few popular forums where people share thoughts on tools, discuss technique at length, and—of course—upload their plans. Some of the most active online woodworking communities include Lumberjocks, Woodworking Talk, Wood Magazine, WoodNet, Kreg, and Sawmill Creek. Search those to see if they have what you’re looking for (either with their built-in search tool or with Google’s site-specific search, e.g. site:lumberjocks.com side table).