Only then, with the reader’s attention "hooked," should you move on to the thesis.
The thesis should be a clear, one-sentence explanation of your position that leaves no doubt in the reader’s mind about which side you are on from the beginning of your essay.
If yours is much longer you might want to consider editing it down a bit!
Here, by way of example, is an introductory paragraph to an essay in response to the following question: "Do we learn more from finding out that we have made mistakes or from our successful actions?
For the first body paragraph you should use your strongest argument or most significant example unless some other more obvious beginning point (as in the case of chronological explanations) is required.
The first sentence of this paragraph should be the topic sentence of the paragraph that directly relates to the examples listed in the mini-outline of introductory paragraph.
The reader needs to know this and it is your job as the writer to paint the appropriate picture for them.
To do this, it is a good idea to provide the reader with five or six relevant facts about the life (in general) or event (in particular) you believe most clearly illustrates your point. The importance of this step cannot be understated (although it clearly can be underlined); this is, after all, the whole reason you are providing the example in the first place.
Active voice, wherein the subjects direct actions rather than let the actions "happen to" them – "he scored a 97%" instead of "he was given a 97%" – is a much more powerful and attention-grabbing way to write.
At the same time, unless it is a personal narrative, avoid personal pronouns like I, My, or Me.