There's no real winter in LA and keeping things dry is no problem, but I have a bike that lives in a cellar for 11 months of the year in Hamburg, Germany. This year I happen to be in Hamburg over the winter and I'm noticing the effects of winter storage on my bike fittings. The bike is aluminium (Crewkerz Guilty) and about 4 years old now. Most all the bolts are titanium so no problem there, but my banjo fittings (Magura MT5) aren't looking so good. Most of the Magura bits I can get in titanium, but I haven't found any ti banjos. I've found some supposedly higher quality stainless banjos that I'll try when I return in June.
Anything in particular I should do to lay up the bike for long periods? I plan on pulling the through axles front and rear so they don't seize in place. Other than that I just clean the bike, lube the chain and hope for the best.