Arranging for a friend to take your photos can be hard, especially around the holidays! Not to worry — your camera's self timer can get the job done. Amy suggests using a tripod or setting your camera on a solid surface to make things easier. "If you can, try to shoot a wide-angle image, leaving lots of room in the frame. This will give you options to crop in tighter later on, but won't result in images where someone is half out of the picture."
While it's not a necessity, "a remote trigger will allow you to click the shutter right from your family grouping." This will prevent someone from running back and forth to set the timer.