Buy a fire extinguisher (type ABC is best for home use), and check its pressure regularly. Many of them come with a simple wall mount that is very convenient.
Also, NEVER add water to a grease fire. It will explode.
Adding to this, depending on where you live you might be able to get a free fire extinguisher from your local fire department. One fire extinguisher in a kitchen turns a three engine call into a one engine call.