Notes in iPhone and Contacts.
If my phone gets hacked (iCloud), then I'm fucked. Then again, I have alerts for everything (checking account, credit cards).
I have 50 notes in my phone for various things. The first line of the note becomes the title when looking through them. I have 3 notes for passwords. When one gets full I create another. Most of the time, if I sign up on a web site, I'll go into the note called Passwords, enter the name of the web site, the e-mail I used, the password, and the 3 challenge questions or pin. I've tried LastPass, but I still prefer the way I just described. Have a note called Food for grocery shopping. Before I go to the store, I type a list of items. As I'm shopping, I check them off. Have a note called "To Do" with a list of things I need to get done. As I get them done, I erase them from the note.
Contacts. Besides people I call, I have credit card companies with their phone number. Have all my car info, doctors, lawyers, CPAs. I enter their phone number, e-mail address, then use the notes field to enter additional info like passwords and challenge questions.
If my wallet is stolen, I could shut off all credit and bank cards quickly. If my phone is stolen, I can get to all that info from iCloud. My phone is my life, I always have it with me.