Place your feeder in an area that gets morning sun and afternoon shade. Being visible in the sun part of the day make it easier for birds to find the feeder. But too much sun, especially full on afternoon sun, will make the nectar spoil quickly. Try to find a spot close enough to house so you can see the hummingbirds, but far enough away that they will feel comfortable visiting the feeder. Being close to a bush or tree gives them a place to watch the feeder from as they are somewhat territorial and will want to keep an eye on "their" feeding spot when not actively drinking from it themselves.