A more thorough best man speech format would begin with a few opening lines and welcome which would be followed by various wedding observations and a few comments on the best man's role. This can be related to the bachelor party, writing the speech or any other typically humorous topic. By this point the tone should be set. For a more sentimental best man speech, insight into the best man's relationship with the groom followed by insight into the bride and groom's relationship and especially how the groom has changed since meeting his new wife are always appropriate and acceptable. Warning, advice and congratulations should always be included as part of the closing.