I have wasted countless gallon ziplock bags when traveling - just unscrew the lids and put some plastic wrap over the opening then screw the lid back on for a much easier spill solution! (not quite as safe as a plastic bag, but a good idea!
Make a quick and easy emergency first aid kit for your purse when you are on the go. Filled with the most important medicines you and your family will need, it's easy to turn a pill box into Moms Emergency Box.
If you want to head to the water for a dip without worrying about leaving your money unattended, don't bring your wallet. Place money in an empty chapstick or marker and so nobody will think to take it!