Plant both feet firmly in the ground and spread them out about shoulder width apart with your feet pointing outwards (an open stable stance). Your arms should be tucked in as close to your body as they will go. If you are using a viewfinder (which I highly recommend), keep the camera close to your face while the picture is taken. If you can only use your LCD to frame your image, hold it close to your body so that your arms are still tucked in. By keeping your arms close to your body, you create more points of contact to stabilize your shot. If there is a wall, fence, or poll nearby, use this to your advantage. If possible, set the camera down and use your camera's self timer. If not, do the next best thing, lean on the object and find a steady, comfortable position to brace yourself and/or the camera.