Know what the tide is doing. A stream easy to cross now might be waste deep in a short time. Where will the tide line be in a little while. Remember a flat area can fill in very quickly. Never leave life jackets or anything on the ground, place it in the boat.
Wakes are usually worse near shore and shallow areas so get up a hill fast if it's big.
Tide flats can be treacherous walking, and even dangerous. Avoid them if possible. Solid looking ground might sink you to your knees. Please rinse your boots before getting back in the boat, or car or house, where ever you are. Avoid devils club.