What are the spare parts that you typically keep handy?
Mainly I've got Lynx Expresses, a few SSR4s and I started building a few smart strings and an active hub (but these probably won't get used this year

). It looks like a blew out a triac at the end of last year, so I need to order a replacement, but I figured, to make paying for shipping worth while, that I'd get a few other spare parts.
So what's recommended?
Thanks.
Jason