I used ExpressPCB from http://www.expresspcb.com to design a small prototype PCB to hold my SMT components -- three "miniboards" (2.5" x 3.8", double-sided w/up to 250 plated-through holes) cost just $51!
To mount the QFN-16 (leadless) package, I fluxed the board and component pads and then tinned them both with solder. I then re-fluxed everything again, aligned the component on the board, along side a 2mm length of solder, and put the whole thing in a toaster oven at 450F until the solder balled, and then held it another 30 seconds.
To mount the LQFP-64 and LQFP-100 packages, I fluxed the board and component pins, aligned the component on the board, and the dry-tacked the corner pins with a soldering iron. I then re-fluxed everything again and placed the smallest amount of solder on the iron tip and dragged it deliberately across each row of pins. On my second board, I decided to try the same procedure for the LQFPs that I used for the QFN-16, and that worked fine, too, saving a bit of effort!
I used a Weller WES51 soldering iron with an ETA (1/16" screwdriver) tip, 60/40 no-clean solder, a Kester #2331-ZX water soluble flux pen, and a PanaVise PV Jr. Model 201 (to hold things).