I thought I would share a few tips/tricks I've learned over the years:
1. Q-tips and Toothpicks: good for painting/staining/gluing
small hard to reach areas.
2. T-pins: good for hanging small painted/stained items while they dry.
3. Scotch tape: good for many things, including holding parts together for assembly, marking where an item should be nailed/screwed, preventing glue from leaking from an item, etc.
4. Wood filler, fine sanding, and paint, work wonders on slightly flawed wood.
5. Small screws and/or pin nails combined with wood glue make assembled items much more sturdy.
6. Emery boards are great for gentle sanding in hard to reach areas of an item.