The Vintage Advantage:

Vintage style photography has seen a surge in popularity among hobbyist photographers. And thanks to photography social networking sites like Flickr, sharing of photographs in the vintage style is easier than ever.
The vintage style has everything to do with colour and saturation. Old photos aren't vivid. There are many ways to tweak levels in post production to achieve a vintage feel.
The first of these is the contrast - toning down your contrast to create a"flatter" feel. There are different ways to change contrast in Photoshop or any other Editing Program.
Bump down your saturation. As we mentioned before, old photos aren't vivid. Just like in the above tip for lowering your contrast, you can make one to adjust color hue and saturation.
Convert to Black and White..There's so much more to black and white than just hitting the grayscale button. Basic grayscale or monochrome is a good place to start, but tweak the underlying blues, reds, greens and contrast to
make it more believable.
Another post production method for vintifying your images is using texture layers. Do you have old photos from your grandma's attic, or a handful that you picked up at a thrift shop? Study the textures. Look at the edges, the water spots, the age spots and dust. Old photos tell a story in so many more ways than just the image itself.
Content is another Key: It goes without saying that a photo of the latest Ford car isn't going to look vintage no matter what you do in post production. It's clearly from this day and age. Pay attention to the images you are seeking to vintify and be sure that the subject matter is conducive to the vintage style.
A couple of great ways to achieve vintage content is to seek out: old cars, vintage clothing for your models, rustic locations, antique furniture or vintage, recognizable and branded paraphernalia like Coke bottles.