If you did your best to write a complete, clear, and insightful essay within the time allotted, you should have nothing to worry about.
Before you start writing, you should make sure you have a clear idea of what you want to say and how you`re going to say it.
If you have enough time left over, read your essay again and make corrections. When you`re working under time pressure, it`s easy to make grammar mistakes or produce hard-to-follow sentences; the final few minutes are your chance to clean up those errors.
When composing essays, many students stop and read over each paragraph once they finish it, making sure that it`s well-written and free of errors before advancing to the next one. This approach is entirely logical when there`s no time pressure involved, but it can actually work against you during an exam.
After the topic sentence, present evidence such as data, examples, or quotes from relevant sources. Be sure to interpret and explain the evidence, and show how it helps develop your overall argument.
In the end, then, one thing is clear: mistakes do far more to help us learn and improve than successes. As examples from both science and everyday experience can attest, if we treat each mistake not as a misstep but as a learning experience the possibilities for self-improvement are limitless.