Hi Mayhemers,
With the diminishing size of electronic components these days (or is just my eyes!) I have been using a magnifying glass to check my soldering, but even that has missed the odd bad joint.
So, I've invested in one of those USB microscopes in order to see a image on the computer screen. The model that I've purchased is the Veho Discovery VMS-001 with a stand (there are many others to choose from). The best feature is the ring of LEDs that give good illumination on the subject that is superior to using a magnifying glass. Also, you can also take snapshots and even video.
The only trouble now is that some of my soldering looks like a pigs ear (and many other assorted shapes!).
In the first photo are solder posts 0.1 inch apart with thin soldered wire and in the second is a piece of 8 thou (0.22mm) wire with a Veroboard hole in the background.
Ian G.