Answer:
Always be polite to everyone you meet during the day, from your spouse and children to your co-workers, to the checkout person at the grocery store. I know, this is easier said than done, especially when you're having a bad day. But if you would want to be treated respectfully; so does everyone else. Give others the same respect you'd like to receive yourself.
Eliminate non-respectful behaviors such as rolling your eyes, concentrating more on your cell phone, or talking over someone. Not only are these actions disrespectful of the person you're interacting with, they deter or prevent further involvement or resolution of issues, and create a wedge that can become permanent. Instead, foster an environment of respectful listening. Everyone deserves to be heard, even if you don't agree always with one's ideas or opinions.
Listening is an active process, not a passive one. Actively listen by taking your own opinions and thoughts out of your mind, and actually hear what the other person is trying to convey. Most often in today's conversations, one person's comments "trigger" thoughts in the listener, who then brings forth their own story along the same lines. Instead of telling your tale, ask questions that encourage the speaker to tell you more. When you practice effective listening skills, you will make others feel important and validated.
People earn respect by always being ready to lend a hand or an ear whenever they're needed or notice an opportunity to help. Look for opportunities to help that you might have previously overlooked. Take responsibility and do things without waiting for someone to ask for assistance.
Your actions are based on your choices, and barring some unforeseen circumstance, there is no reason for excuses. Own your actions. If you're late, it's probably because you did not manage your time effectively. If you didn't finish a job, it's most likely that you didn't focus on the task at hand or you got caught up doing unnecessary tasks. Own up to your mistakes and instead of dwelling on them, look for opportunities to move past them and commit to doing better.