You live in a crazy, crazy world. And crazy bad things happen here all the time. But it's important to realize that through it all, you are not powerless -- and you especially have the power to help others.

Whether it's emotionally or physically, there are ways to prepare yourself for situations in which you could step in to help save a life . Taking action now could even help prevent such situations from happening in the first place.

Here are some very easy ways to start.

1. Donate blood.

You can save three lives donating blood just one time . Set up a drive at your school or office, and millions of potential recipients will thank you. The Red Cross needs all types, rare and otherwise.

2. Join the bone marrow registry.

Your unique body matter could be the cure for someone with blood cancer, an immune system disorder or many other sorts of disease. Do your research , join the registry , and prepare to be part of a miracle .

3. Make sure your building's elevator is ready for an emergency.

A recent study found that people on higher floors of buildings have lower chances of surviving cardiac arrest, as it takes responders longer to reach them. You can help by making an action plan for your home or office and providing quick elevator access when medical personnel arrive.