Buy more than one kit for a MTB. At least a FS bike.

That's deraileur cables to be more specific, but probably also applies to brake cables.

I didn't think about it because the Jagwire kit I got (from a friend) had WAY more stuff in it than I needed ot string up my bike, but the Dura Ace kit only came with like 4 end caps and like 3 short pieces of cable housing.

I had to go to my LBS and get some cheap bulk black housing and those gay chrome endcaps they sell in walmart bikes to get it put back together. I'll be changing that out real soon.