1. Remove the lens covers, if they are in place.
2. Set the diopter on the right barrel eyepiece. The function of this setting is to adjust between vision differences between your eyes if you are NOT wearing corrective lenses. Set to zero if you do have corrective lenses on (glasses or contacts). For proper diopter adjustment see this article: Binocular Selection Guide
3. Most binoculars will hinge in the middle to allow for differences in the spacing between the eyes. Set the spacing to fit your eyes.
4. Adjust eye cups. Each eyepiece will have a means of maintaining the correct eye relief for the user. On quality binoculars the rim of the eyepiece will extend and retract as you twist the eyepiece rim. Move all the way in if you are wearing eyeglasses or adjust out if not wearing eyeglasses. You will know if they are set correctly when you look through the binoculars and check to be sure that the circular edge of the view should be sharp and not fuzzy. At this point we are not looking at any object in the view but rather the perimeter of the view. You may need to adjust the eye cups again to compensate. On lower cost binoculars the eyecup may only be a rubber lip that you either fold over (the "in" position) or out.
5 Raise binoculars to your eyes and use one finger to adjust the focus wheel on the center shaft between the two barrels, until the view is in sharp focus. If viewing for extended periods you may want to keep your elbows down near your side as this will increase comfort while viewing.
Final safety tip: Do not look at the sun through binoculars.
Many people enjoy observing nature with binoculars. Having them handy is key. Hunting, astronomy, marine use, and stadium sports are a few more activities where having a pair of binoculars can make a real impact to your experience.