An invocation speech is given to invoke or ask for cooperation, assistance or help. Invocation speeches are commonly given at charity events and to organizations that call for action from participants and members. An invocation speech should aim to inspire audience members and give them the knowledge and motivation to move forward with a specified task. The key to writing an invocation speech is to speak from the heart.
Set the tone for your invocation speech based on the type of event and cause for which you are preparing it.
Consider the person who will give the speech. Speeches should be delivered naturally, and should play on the personalities of the people giving them. If the person giving the speech is jovial and humorous, for example, it is easier to infuse that tone into the invocation speech -- if that is the tone you want. The key is to write a speech that matches both the speaker and the tone you deem appropriate.
Speak to the person who will deliver the speech and ask for examples from his personal life. Draw connections between the speaker's personal life and the topic you are writing about. Invocation speeches that are from the heart and that relate to the personal life of the speaker make the topic more real and the speech more persuasive.
Write the speech a little at a time rather than all at once. Write down ideas that you want to include and take your time finding the right words and the right ways to express what you want to say, again keeping in mind the tone of the event and the personality of the speaker.
Impart words of wisdom in the invocation speech. Borrow from -- and give due credit to -- inspirational speakers such as Albert Einstein, Winston Churchill and other leading figures in various fields. An inspirational quote from an admired citizen, poet or political leader is a great way to start your invocation speech.