One bit of advice that I forgot to take was dont drink too much before your speech!!.
I had one glass of bubbly too many and when I got my notes out of my pocket I was struggling to read them, had to down a few pints of water, and luckily I had the speech pretty much memorized.
So another tip, Practice your speech, lots!! Think mine went down quite well, or so everyone said, lots of laughs and a few people in tears at the slushy bits.
I had lived with my wife for 9 years before we got married and said "we have lived together for a long time now, but I need to tell you I havnt married the woman I want to live with, I have married the woman I cant live without". This line went down very well!!