Manufacturers that produce woodworking tools and materials have got into the content creation game, too, and some will share woodworking plans online. Minwax and Ryobi, for example, provides their plans free of charge, and Rockler offers their woodworking plans for a fee. Seek them out along with the other blogs and you’ll have a handy list of resources you can turn to for any project.
My dedicated shop space is about 8′ x 4′, the rest is a one car garage that needs to stay open for my wife’s car. I will sometimes set up some plywood and sawhorses in that space for assembly though. The section that is my dedicated shop has a floor made of 2″x6″ lumber stretched out over joists on top of dirt. It is an old floor filled with knot holes, cracked or broken boards (with temporary plywood screwed over them) and just generally uneven. If I cannot build a shed as my new workshop I will be looking at redoing the floor in my current space. Not sure how I would go about it though.
French cleats are a simple way to hang things on walls while allowing easy repositioning. One bevelled cleat is fastened to the wall and the other is fastened to whatever you want to hang. One catches the other and gravity does the rest. French cleats are commonly cut at 45 degrees but I prefer to cut mine at around 30 degrees. This makes them easier to lift off the wall (especially way up high) without sacrificing security.
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).