Click here to read more on how to craft the perfect wedding toast.[1]

In theory, giving a wedding toast is easy. Just say a few nice words about the bride and groom, then ask the assembled crowd to raise their glasses.

But such toasts often come up short — or worse, become the low point of the wedding weekend.

Should you be asked to give a toast, there is no need for it to live in infamy. Here are a few guidelines with some memorable toasts from television and movies as examples of what to avoid.

The Two Ronnies Drunken Wedding Speech
Video by BaronReggieDixon

1. Keep the alcohol at bay. Even Dean Martin sipped apple juice when performing.

If there is one common denominator for the world's worst wedding toasts, it could probably be measured in blood alcohol content. Giving a good toast is tricky enough without trying it with half of your wits about you, so wait until afterward to enjoy your favorite beverage.

[Video: The Big Bang Theory - Amys, Leonards and Sheldons Wedding Speech [HD] Watch on YouTube.[2]]

The Big Bang Theory - Amys, Leonards and Sheldons Wedding Speech [HD]
Video by Qashi

2. Don't wing it. Think about what you are going to say long in advance. Then write it down.

"You should start writing a wedding toast months before," said Peggy Klaus, a speech and presentations coach in Berkeley, Calif. And practice your toast in front of a mirror several times to nail the delivery. "If you don't prepare, your nerves will take over, and it just won't work," Ms. Klaus said. Everyone needs an editor, and if you don't have one handy, ask a friend or a spouse to play one for a few minutes and show them what you plan to say.

Bridesmaids Engagement Party
Video by Shannon McInerny

3. Keep it short and simple. No more than three minutes. (Lincoln finished the Gettysburg Address in less time, and that seemed to turn out O.K.)

"You basically want to tell one nice story about the couple and wish them well, and that's all anyone wants to hear," said Sarah Parker, who wrote a how-to book on wedding toasts. "But you should find time to identify yourself and your relationship with the newlyweds, and perhaps remark upon the beauty of the ceremony. "

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Keeping it short will allow you to spend time polishing those few sentences that you will have to deliver.

Best man Speech - Four Weddings and a Funeral
Video by 4weddingsscenes

4. Don't rush it. Speak slowly and loudly enough for everyone to hear.

Nonprofessional speakers tend to rush through a speech, or talk so softly that many people strain to hear what they are saying — if they can hear it at all. Some speakers post a friend at the back of the room to signal whether the speech is being heard there.