The best way to watch birds is to put up bird feeders. I suggest you steer clear from the cheap mixed bird food, as most birds generally avoid that. Put out black-oil sunflower seeds and you'll get a great variety of birds.
You might also want to set up a bird bath or fountain, as birds are really drawn to water, especially running water.
Also, if it becomes a problem that birds start crashing into your window, look into Bird Alert Decals. Don't be daunted by this! Bird watching and bird feeding is a great experience for both humans and birds if it's done right!
