I found this article in Mens Health Magazine - great suggestions.
Guys Guide to Surviving Your Buddies Big Day
My favorites are:
Toasting-the ideal speech lasts 3 minutes or less. Segue from humorous, PG-rated stories into tender moments. "Now that's what I call love," or "And yet, she still said yes." Remember, it's not a roast or a bachelor party. Keep it clean. "Don't say anything you wouldn't be comfortable whispering into the bride's mother's ear," says Roney.
(I just wish the BM at our wedding listened to this advice - we still aren't speaking...)
Dancing-It's your best chance of wooing a bridesmaid, so ease on out there, Astaire. If your proficiency peaked in junior high, embrace slow songs or ones that revolve around jumping ("Shout"), simple hand movements ("YMCA"), headbanging ("You Shook Me All Night Long"), and hand grabbing ("We Are Family"), suggests Craig Michaels, author of Thirty to Wife: The Tell-All Groom's Guide to Weddings. And know your own limitations. "Never slide across the dance floor like you're stealing third," he says.