Use an old chapstick container to store cash in a concealed and waterproof way.
This works well if you're on vacation or near the water and don't want to carry a wallet but need cash on hand for street/food vendors. The best part is it'll be waterproof as well, so you don't have to worry about the awkward "wet dollar" transaction.
More Finance Tips
Always ask for the price before pulling out your money with street vendors.
If they see you with a wad of cash, they can be more enticed to raise the price for you.
You should own a credit card, but not be in debt with one.
Always pay more than the minimum credit card payment.
If your bank has mobile notifications, enable them.
You can get a nice purview of all transactions as they happen which will allow you to quickly catch any fraudulent purchases.
If you're looking for a financial planner in the US, ask if they are a "fiduciary".
A fiduciary is legally and ethically required to put their clients interests before their own. Additionally, look for people that have the CFP® certification, since all CFPs are required to be fiduciaries.
If you can't live within your means, you will never be happy.
Instead, you will increase your spending with every raise/promotion/windfall.