Never apologize for or otherwise undercut the argument you've made or leave your readers with the sense that "this is just little ol' me talking." Leave your readers with the sense that they've been in the company of someone who knows what he or she is doing. Also, if you promised in the introduction that you were going to cover four points and you covered only two (because you couldn't find enough information or you took too long with the first two or you got tired), don't try to cram those last two points into your final paragraph. The "rush job" will be all too apparent. Instead, revise your introduction or take the time to do justice to these other points.
While the body of the essay should generally include objective information, the conclusion should include one or two sentences articulating the author's opinion. This stance should not be conveyed using an "I" statement, which is usually not recommended in formal writing. For example, a sentence relating to the thesis statement comparing life in the city versus life in the country could be, "For these reasons mentioned above and others, life in the city is more advisable for individuals for whom a better quality of life is non-negotiable."
Working side-by-side with the PA over the past year, has allowed me to truly grasp the extent of the level of knowledge and skillset required of a PA. She divulges in her work; changing gastrostomy tubes, treating both bleeding and leaking stoma sites, comforting patients with genuine empathy; a true master of her craft. I am amazed at the level of autonomy in the PA’s daily routine; being able to develop treatment plans for patients, performing procedures and making recommendations. When situations arise that require the physician’s expertise, he is only a phone call away. From their conversations, it is obvious the physician and PA have a very close relationship built on mutual respect and trust. I gained a very clear understanding of the physician-PA relationship and the communication necessary to effectively provide the best patient care.