Joining in with the wallet discussion....
I don't carry very many cards. Some reward cards will use your phone number. I don't always give my correct number, I switch the last two digits cause I don't trust what the vender wants with it.
In fact many times I carry a flat wallet that only holds folded bills, my drivers licence, my phone, a debt card and one credit card. That's it. Any retail card can be located by the register's computer. If I know I'm going somewhere like a dr's appointment I add my health cards. The Library can use my drivers license. I don't need my AAA card because their phone number is on my phone along with my membership number. I do have a larger wallet that I use sometimes....I just hate to carry all that stuff.
I have several different purses..the main things that I carry are my "little" wallet", contact case and wetting solution, a very small pill container, a brush that folds flat and some lipstick. I also have a small cross carrier purse that has slots for credit cards and such.
I do have regular size purses and several nice leather backpacks that I use on occasion. I keep emergency things in my car which Sweetie is always laughing about. I have a medium size soft cooler that stays in the car. It has 8 bottles of water, two emergency space blankets, a fire starter, a few energy protein bars, a knife, dental floss...works great to tie up things, is extremely strong and takes up very little room... plastic bags, paper and pencils...ink pens can go dry, there's a reason the first astronauts carried pencils..gravity and ink...an instant flat tire repair system and a fire extinguisher. In the front compartment between the two seats I have one of those metal hammers that can break through windows and has a slicer that will cut through a seat belt...it would also work will if I needed to defend myself lol. I use the slicer all the time to cut through those stupid tags stores put on things like clothes and such.
And just so you know..Norma keeps a Swiss knife in her purse too. She showed it to us last night at dinner.