Selecting Fonts is very very “very” important in pretty much anything in the digital sphere nowadays. Using the wrong font style for a certain marketing piece can be very detrimental and turn people off from the message that you’re trying to shoot for. Designmantic made an excellent infographic that shows the 10 commandments that everyone should follow while using tyopeography. You have no excuse now:P
Click the link to view the infographic on designmantic’s site, or just lick the pic below to view the infographic in a larger window.