The biggest thing you can do for someone like me is to maintain a comprehensive, current, and easy to find glossary. I've just spent this evening - my first - looking into this Linux thing and I'd get a lot more out of it if I could quickly look up all the undefined words and acronyms that I've encountered.
If it's a hypercomplicated term, just tell me whatever I need to know to understand the sentence I was reading, say there's more to it than that, and you can stop there.
This wouldn't be as much fun as writing tutorials but I can't think of anything that would be more helpful.
PB