oh god! salt-preserve them! they are incredible! i make two quarts a year and use them in everything. PERFECTLY amazing flavor, like nothing else. one of my favorite things ever is chicken tangine (obvi without couscous) with preserved lemons and olives. please please please do it. meyer lemons are so special- dont waste that rind and zest! plus, they are sp pretty and make beautiful gifts.
Pickle them. A few minutes with Google will give you hundreds of variations to work with. Whole chicken stewed with oil cured olives and salt cured lemons will change the way you think about chicken for the rest of your life.