Take nothing but pictures, leave nothing but footsteps.
I finally remembered my camera today, just in case my new friend shows up again. Used to take this thing almost everywhere with me, but the resolution in camera phones these days are such that I almost never bother anymore, even if the lens and software of my mobile will never match a DSLR.
Plus mobiles are instant. Take a snap, maybe tweak the levels or crop or straighten immediately after, then post to here and/or Facebook and it's done.
There is an honesty in an image like that which is almost poetry in itself, in my opinion.
But the real trump card for my mobile is that it's waterproof and always with me. The Pentax isn't.