It takes more than just staying sober for your toast . You should definitely do that too, though.
Make a list of duties.
In addition to the obvious ones, there's delivering the fee to the wedding officiant, signing the marriage license and much more. Check out this Real Simple checklist for a comprehensive list.
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Make sure your suit actually fits.
The groom may choose the suit style and tie color, but not looking like a baggy mess is on you.
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Get the shoes right.
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Clip-ons need not apply.
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