I also use a CC for most expenses, but besides small bills, I like to have a handful of large bills (1 or 2 hundreds, a fifty, a handful of twenties) because la

I also use a CC for most expenses, but besides small bills, I like to have a handful of large bills (1 or 2 hundreds, a fifty, a handful of twenties) because large bills are a great way to ask for favors. Nobody's going to remember a 10 you hand them, but a 20 is going to stay in their head. A fifty or hundred is going to sit in their wallet, and be a recurring reminder. My rule of thumb is that asking someone to commit to doing something they probably would have done for free is a twenty, asking someone to bend the rules a bit through inaction is a fifty, and asking someone to act in my favor in exception to the rules is a hundred.