I have a project I've been messing around with for a while and finally found a device to do temperature measurements, but couldn't find one that was already assembled. Assembly wouldn't normally be a problem, but it uses several of micro sized surface mount components. So I finally took the leap and bought some new soldering tools/supplies.
A hot air rework soldering station, tweezers (a must), and a jewelers loupe (another must).
This is the board, I soldered all of the surface mount components first. The loupe was a must as those numbers and symbols are mighty hard to see without it. Also comes in handy to inspect the solder joints. The solder used was actually a paste that comes in a syringe, basically a flux with very fine solder particles in it that melt and connects itself to only the metal contacts.
Next I added the through-hole components and used my 15w iron to solder those.
This is the completed shield attached to an arduino micro processor.
This is a video of how the solder paste works...
Here is a example of someone just using a toaster oven at about 400* to do all the surface mount soldering.