Misstating anything, either verbally or in writing, will only wind up being counterproductive because as soon as the employer detects a lie, you will automatically be removed from consideration for the position. In an interview, instead of speaking generalities about how wonderful and capable you are, give concrete examples which demonstrate how effectively you contributed to an organization's performance. Just state the facts. If you do a good job of marshaling your material, you will probably find that the facts are strong enough to speak for themselves. You do not need any lies or exaggeration.
Good work speaks for itself if it is properly presented.
Avoid bringing up anything that may be perceived as a negative. Give examples of your ability to work well with others. Employers, today more than ever, want to hire people who will be able to fit in well with the company immediately and be effective team players. By citing positive examples, you will give the employer reasons to screen you in, not out.