One of my players ( +Joe D to be exact) has a default equipment list that he buys for all of his characters once they have the gold to purchase from the list. It's made up of a myriad of little things (and I really should find out how much it all weighs, but I've never been a stickler for that).
It includes stuff like small flasks of acid, chalk, flour, honey, iron nails, small hammer, string, etc - I'm sure iron pyrite is on there somewhere. It's a huge friggin' list that pops up in the Roll20 chat box each time we start a new campaign (or Joe has a new character). It's basically his "bag o' tricks".
Do you have such a list for your characters? Would you use such a list if it were available?