Phone is in neither pocket because I normally don't carry my phone around. ;D But whenever I do, it goes into-- actually, I'm not sure which pocket it goes into. o,o Maybe my left one.
But pretty much, aside from that: keys go into left pocket, wallet goes into right pocket. I feel like that might have been switched years ago, but if it was it most certainly isn't now!
And then if I have to carry around anything extra, depending on what they are those tend to go into the right pocket first, if they're flat things like slips of paper. If not, then left pocket because there tends to be a little more room there.