Being an Apologist _ You do not use your personal statement to explain why you lack certain skills or experience. The point of writing this short paragraph is to sell yourself and this involves highlighting your strengths instead of apologizing for your weaknesses which in itself is a sign of weakness. The time and place for discussing flaws in your suitability is the interview and at that point, you must focus on how you plan to overcome any holes in experience/skills etc.
The conclusion _ Afterwards, go over your draft and try to summarize your points. Do not suddenly introduce any new information in this section; read through the body of your paragraph again and base your concluding paragraph from it. You need to reiterate all the points you made in the body and briefly relate them to your theme to show how they are all connected. More importantly, the conclusion should reiterate your main theme and tie up to the introduction to neatly sum up your essay.