Badge Box Minders

I have received my Badge Box kit, ID badge, pages of info etc...

I'm making the little boxes up, and hope to pop out to a few places this week to try and get them placed, I was wondering if there are any Badge Box minders who use this site who could share any hints and tips for me and others.

My info pack says not to place them in places where there are caged birds, also I was wondering if there are any store chains where it wont be worth bothering to try to place boxes, such as Tesco etc... as I notice my local Tesco already supports a charity through most of the stores I've sen.

Anybody got any tips.?