After a very long time deliberating, I finally decided to buy a spot meter. I got a Minolta Spotmeter F. Previously, I'd only been using incident metering. I'm trying to do the Zone System. I don't think I've mastered it yet, but I'm definitely taking shots I would not have tried previously. Here's one:
Fuji GS645S, Portra 400
My intention was to put the sky on Zone VI to get pastel colours, and to accept that the tree would fall into deep black, making it just a silhouette. I'm not sure it's a great photo, but it turned out the way I wanted, which is quite satisfying! I wasn't as successful with some of the other shots on the first roll, but it seems like a good start.