It's taken a good long time, but I've finally managed to change my brain to "I must have sufficient terrain to play the scenario we want to play this weekend — do I have it? If not, make the missing bits."
It makes the job so much more manageable, and of course stocks will accumulate over time so that I'll have fewer and fewer things to make for any given game.
Achievable goals, that's the key.
Something I've never done, and which I probably should start, is to keep a few notes on my processes for particular terrain modules — paint colours, materials etc. That way, when I come back to making river sections, for example, after a year's break, I'll be able to make bits that are more likely to match up with existing pieces.
