I almost always lock up my bike when I go in a store, restaurant, etc. Campgrounds, try to lock it to a tree or heavy object. Motels, I try to get a first floor room and wheel the bike into the room.

I just use a coiled cable lock and padlock, usually a combination lock. A friend of mine that works at a bike shop told me that most cable locks can be cut pretty easily with the cable cutters that bike shops use for cutting cables such as derailleur outer housing cables. I have no reason to doubt him on that, so I have a bit less comfort in such locks now. But I still carry the same cable lock that I have been using for years. I have been pretty amazed at times how good my Sram cable cutter is, I suspect that if I could get a cable into the jaws of it, it might cut it pretty easily.

But sometimes if I am going into a restaurant or some place where I expect to be near a window, then all I really need to do is slow down a thief. Thus, sometimes I just use a small skiers type lock that could easily be cut.

That friend of mine that commented on cable cutters cutting cable locks, he now carries a very heavy chain to lock up his Ti bike that has Phil hubs. (See photo.) I still use a cheap cable however.

Exception, when I was in Iceland, there was so little theft there that I often left it unlocked.

When touring, I usually switch out my quick release skewers for some skewers that use a 5mm allen wrench. I do not want anyone to steal my dynohub front wheel and I usually do not put the cable around my front wheel. I also use those skewers on the back wheel on my Rohloff bike. Any 5mm allen wrench will open them, so it is not that secure, but I assume most thieves are opportunists are are likely not carrying around a bike multi-tool.