The best man's toast is given early during the reception. If the best man is married, he may like to seize the opportunity and share with the couple some advises for a happy marriage. He can also just wish the bride and groom his best wishes. Another popular though not always a recommended approach at a wedding is telling the guests some stories about the groom's wilder days. But this last one might cause some embarrassment to the couple if the wedding is attended by conservative guests.
If youre asked to give a speech, no doubt youre nervous and at a loss for what to say. The best advice is to keep your speech short and simple, so that your nerves dont have time to take over and so that your creativity isnt sapped.
Make a list of all of the things that you admire and love about the couple or half of the couple. If youve been friends for a while, you may want to include a joke or a story. The best advice is to keep the story clean thoughtheir parents may not want to know what theyve done.