I used to have a garden shed to keep the bike in which was nice, I moved and had it locked to the building in the back yard of the new place with 2 Kryptonite chains. One was braided and the other was chain link, strongest and most expensive on the market. They did me no good since I forgot to lock it up one night after changing oil and taking the battery in for a charge, fell asleep and didn't go back out to lock up.
Completely my fault but it was only one night, neighbor was very dismissive and strange when I questioned him, probably called some friends over to steal it. All of which I reported of course.
One of these:
