I shoot a fair number of weddings and have for a few years now. There is nothing to worry about. Rebekah is right, the best man speech works best if it is funny. The maid of honor speech is usually heartfelt.

'When I first met Suzie-Q, I knew I had a friend for life. Suzie-Q is wonderful, kind, and caring. *blah blah blah* We've been through the good times and bad - remember the reaction to that waxing experiment when you couldn't wear underwear for a week? *blah blah blah* When Suzie-Q met Buck, I was happy that there was someone out there just for her. He makes her happy. *blah blah* They are a team. *blah blah* They are very much in love. *blah blah* Very happy for them. *blah blah blah* Here's to the new couple. We love you.'

Keep it 2-5 minutes. Stay positive (no snarky digs). Make it sincere.

You'll do fine.