As your attorney I suggest you keep doing what you're doing, it seems to work. If you're bike gets stolen that one time you deviate from your routine, you'll want to shoot yourself. One thing my dad taught me a long time ago was to use the right tool for the job, aka, use a u-lock. My rule of thumb with locks: no matter what, if I have a bag on my shoulder, I have my ulock, cable and toolbag.

The only bike I have ever had stolen was the bike that I left on the side of house unlocked.