SMD (surface mount devices) components have been around for a long time but for the most part I have been able to get away with just using through hole parts. However more and more parts are only available in SMD form factor so you may as well get on the SMD bandwagon.
You can solder the SMD parts (least the larger ones) by hand but it can be difficult and time consuming. This site shows a good technique.
One of the easiest options is to use solder paste and a hot air reflow tool. These tools typically consist of a wand with a heater element and blower connected to a power supply with a speed and temperature controller.
To solder a SMD device you apply small dabs of solder paste on each pad, place the component on the pasted pads, apply heat with the reflow tool until the solder melts. You can find some good information on the technique at this site.
There are various options for building a reflow over using a small toaster oven. I’m going to cheat and link an Instructable article I did a few years back rather than rehash it all here (I’m lazy). The Instructable goes over both fabricating the oven (in great details) and using it to solder PCBs. Here is the link to Making A Reflow Oven Instructable