This is the most complex or detailed soldering I've done so far, the QFN20 package is very small but still not impossible to ...

In this video tutorial, [Dave Jones] at the EEVblog covers soldering, detailing good practices and common mistakes to avoid when working with through-hole components.

The TDD Series surface mount jumper DIP switches from C&K components are sealed with a removable top tape to enable them to be used in reflow soldering and washable assembly processes.