How can I make coffee with a minimum of equipment and maintenance? My household doesn't regularly drink coffee, but we occasionally want to provide coffee for our guests, or need to use coffee as an ingredient in other dishes.  

We do have a coffee maker (a "free" one with a subscription to mail order ground coffee beans) - but it's been sitting the garage for ages.  It's now dusty, and requires too much cleaning and counter space for the intermittent times when we do want to use it.  

What's the bare minimum of easy-to-maintain equipment that I could use to produce plain old coffee?
I'd pick up a simple cone filter at the local coffee shop.

Insert a paper filter, add grounds, pour hot water through.