Learning how to respect everyone is one of the most vital of lessons that we can all learn. Think before you say something, some people just need people to listen and understand where they are coming from before they are preached at.
Be there when someone asks you to be. Even when people make a situation seem unimportant, when a person asks you to be somewhere, they are asking you to be there because they truly want you there.
Just honor people in the same way that you want to feel honored. Though everyone has different standards and beliefs, we should often put ourselves in the shoes of others in situations so that we can best try to gather the ways that they may be feeling possibly.
Just because something doesn't mean that much to you, or just because it will have little to no impact on your life, doesn't mean that the same mutual feelings will be shared by everyone else you encounter.
Respect people's feelings. Even if it doesn't mean anything to you, it could mean everything to them.