One thing that I advise people to do, and they usually think I'm crazy, is to create a problem with whatever they're using, especially if it's just a fire hazard. Create a fire in a controlled setting and in an expected manner. Take say, 50-100 mg of Raney nickel out on an open lab bench and see how long it takes for it to light on fire. This may sound dumb, but it gives you two things:
1. You now have a much better feel for how reactive this material is.
2. You now have experience with this material on fire, so you won't be surprised if it does go and will be able to deal with the fire appropriately.
So many injuries that I see occur when someone is so afraid of the material that they're working with that they injure themselves or create a specific hazard due to their fear. Respect the hazardous materials that you're working with, don't fear them. If you fear it, you're only creating more problems for yourself.