Stand where the breeze blows in your yard and then look for shade or make some. Trees, your porch or any structure - even a suspended beach umbrella - can make plenty of shade.
Get a freestanding frame for easiest installation - you can put it wherever you want. Invest in a heavyweight tubular steel frame.
Use trees for hammock mounting, but take care - trunks should be at least 6 inches in diameter. Loop nylon rope around the trunk above a crotch to hold it in place, secure it with a hitch knot and then attach the hammock or its chains to the rope with a bowline knot.
Install poles to make a stable frame anywhere you can dig a hole and pour some concrete. Sink 8-foot-tall, treated 4-by-4 posts into the ground at least 18 inches and space them the length of your hammock plus 1 foot.
Use S hooks to shorten your hammock's chains to a comfortable position and to take up the slack when the hammock stretches slightly with use.
Add extra lengths of heavy-duty chain to hanging loops if you'll need to adjust the height frequently to accommodate children.
Add finials to top the posts (if you're using posts), as well as such comforts as a weatherproof pillow, radio and side table and then potted plants at the base of your frame to complete the summer scene.