So far most people who came to me for help also needed my skills to solve their problem. So my tools didn´t leave my hands. My coworkers stopped making jokes or giving me funny looks for being prepared. Giving a helping hand helps to build the proper reputation for preparedness.
A good office should have basic first aid supplies. It´s a good thing to watch over that supply to make sure that items are replaced and changed in time. When you volunteer to care for it, you make sure that you don´t have to invade your kit and you earn points for good social behaviour.
Preparedness extends to your environment. When you are the "go to person", you may even aquire the power to increase the supply of equipment in your office.