Found a design you like? A fragment of text, or type? Well, are you familiar with screen capture?
STEP 1 - Just press the apple key + shift + 3 simultaneously and ye shall find a photograph appear on your desktop. It's that easy.
STEP 2 - Crop the area to show just the piece you want to transfer over to Illustrator. Illustrator uses what we call "vectors", mathematical arcs and angles that maintain their proportions at no matter what size the design is viewed or reproduced. English please? You don't get all those little squares (pixels) when you make a photograph big. It sounds like black magic right? Well, I guess it sort of is a lot like magic. It has its limitations. These tricks don't work all the time in every situation for everything, but there are a lot of projects you can apply the "magic" of vectors to.
STEP 3 - Once you've cropped the screen capture to show only (and I mean only) what you want to vectorize, save it to the desktop. I don't want to geek out on you, but you must know what a jpeg file is. Save it as a jpeg. You do this because it is the most widely used file type for photos and design on the web. 300 res is the best to work in for almost anything. Save it as 300 res. No 72 res for this one, yet.
STEP 4 - Drag or open the file in Adobe Illustrator.
STEP 5 - Open the Livetrace option. This will differ in location depending on your edition of Illustrator. Mess with the options until you get the angles of your photograph to match up with the original. You'll see what I mean.
STEP 6 - Finally, vectors! You can use these for book, type, and all sorts of media requirements.
If you're using font types, and you find yourself using them in an organization, company, or very, very, often in your practice, please pay the people with the money you make from your success for their contribution. Typography doesn't fall out of the air like snow crystals, and we all like to eat a warm meal for dinner. Typographers are diligent and hard-workers, usually deserving of their time and precision.