Let's Get Toasty
You are going to want have SOMEONE toast you; usually one or two of your bridal party, your parents, the guy who owns the coffee truck who introduced you….who knows….
Whoever that may be, encourage them to write down the things they want to say, and not to feel dumb about reading from index cards when their moment happens. They will be much more focused, less nervous, and probably will not say something they didn’t plan on (which may be a haunting for both you and them). Their remarks should last between one and three minutes, not include references to anything funny but embarrassing (which may seem cute at the moment, but not after the fact).
It’s not mean for you to gently give direction here; almost everyone you ask has never been asked before. They want to to most wonderful job ever, and you can help them do that. It’s all good!