I have a small aluminium exposure calculator. It basically is a dial in a sleeve with small holes in it. You start out with the film speed, then choose time of year and time of day, then weather conditions and finally scenery to shoot (in).
What you get is an exposure combo that is at least 'in the ballpark'. From there on it's all the printers job.
I use that exposure meter quite often because once I know what the light is like at my patch, I can concentrate on focusing, framing and shooting.
Here's a similar one: