I use a backpack, usually with my iPod in my jacket pocket when walking to/from work.

I have a pretty terrible attitude towards phone usage - I rarely answer it (I usually let it ring out and return the call if it is from someone important). Most people I deal with regularly know to text or email me rather than phoning.

That would also work, but I would find it too annoying to have to carry a backpack everywhere. But hey if it works for you, that's great.