Postcards have been around for a long time, and they are also likely to remain with us for an even longer time. They are effective tools at conveying communication from one person to the other. They’re also supposed to be a fun way to let others know about your travels and what you’ve seen and done along the way. But rather than buying a cliche postcard the next time you travel, how about making your own out of one of those crazy concert or festival pictures you took?