Summarize this article in one sentence.
The younger your birds, the more quickly they'll adjust to you and your home. Younger birds will only ever be familiar with you and your space, and they shouldn't have to overcome any bad experiences with previous owners. Mature domesticated pigeons should eventually learn to trust you as well, but they may require a little more time and patience. Pigeons are extremely social birds who need constant companionship. If your pigeons choose to court and mate, they'll be together for life. Plan on keeping at least two birds. If you have room, consider creating a small flock of four to six pigeons.  If you end up with a mated pair, you may need to keep the pigeons from breeding. Female pigeons lay eggs every month. Once they've laid two eggs, remove the eggs and replace them with warmed-up wooden eggs. Both pigeons will continue to sit on the wooden eggs until they realize they won't hatch. Destroy the real eggs by leaving them outside for other animals to eat. This process will need to be repeated each month.  If your female bird is sitting on a fake egg, it won't continue to lay eggs. Laying eggs too often can result in calcium deficiency and death. Any female bird can lay eggs, though without a male bird they will be infertile. You can find fake eggs online. For example, try http://theeggshop.com/. There are many domesticated pigeons without homes located at animal or bird shelters and rescues. While adopting may not allow you to choose the exact age or breed of pigeon that you'd like, you'll be helping out a bird in need. Adoption is also a generally less expensive option than purchasing birds through breeders.  Most adoption services will cover any initial vet bills. They sometimes also allow you to foster your birds to see if you make a good match. Adopting may provide you with birds that either require more time before they're tamed, or that never become fully comfortable being touched or handled by you. Be ready to spend lots of time building trust. Find reputable breeders by contacting them directly. Ask how long the breeder has been operating, and see if they'd be willing to send photos of their facility to make sure their birds are well treated. Breeders can allow you to choose younger birds, or racing, homing, and other types of unique pigeons. They'll also be able to provide you with a pair of birds that's used to spending lots of time with people. Birds from breeders may be ready to be handled more quickly than rescued birds. However, they'll likely cost more than rescued birds. If you find a lost or injured wild pigeon, take the bird to a wildlife rescue that won't kill the bird. While wild pigeons may eventually become comfortable as pets, they'll likely never be as tame as domesticated pigeons. It's also not fair to the wild bird to prevent it from enjoying its previous lifestyle.  Before you take the pigeon to the rescue, call the facility to be sure they're prepared to care for and then safely release the pigeon. You can find a map of bird-safe rescues located in the United States here: http://www.pigeonrescue.org/resources/some-pigeon-dove-friendly-rescues-in-the-us/  Most animal rescues will not kill the bird unless it is beyond saving or has a low quality of life.

Summary:
Adopt or buy young birds for easier taming. Pick pigeons in pairs or groups to keep your birds happy. Adopt your pigeons to save homeless pets. Find a breeder online to buy a specific type of pigeon. Avoid adopting wild pigeons.