If using a  garter belt with hook and eye attachment, put it on back to front so you fasten it at your waist to make it easy and then twist the fasteners to the back so the garter belt is now fastened and facing the right way. If there are no fasteners then simply pull on the garterbelt like a girdle and make sure it is centered.
Stand up and ensure all garters are hanging down and of equal length. You may want to make the rear garters slightly longer if you intend sitting a lot of the time.
Put your stockings on. Make sure you remove all jewelry and ensure nails are smooth so as not to damage your hosiery. Gently roll up the stocking like you would a sock and then slowly pull over the toes, ankle, calf and all the way up to the thigh. If your stockings have seams then check they are straight in a mirror before attaching to the garters.
Fasten the stocking to the garters one at a time. First unclip by easing the rubber o ring up to the wider end of the clip. Place the top of the stocking over the rubber o ring, bring down the metal clip and ease the rubber o ring down to the narrowest part of the clip to fasten securely. Repeat for all garters on both legs. Bend the knee to do the back garters so that there is less pull on the stocking to make it easier.
Adjust the garter length.