You don't mention it, but the tool suggestions are good ones only if you(or your friend) know how to use them. If not, then the cell phone is a better option assuming there is someone you could call to pick you up... Of the cash/credit card option the cash is better since it can serve a dual purpose as a tire boot... I heard tube/patch kit, but one of you should have a pump (or CO2 with a couple of cartridges.