Without a hot jacket on, it gets really cold. It takes longer to get to your blind than you remember. It is harder to find your blind than you remember. Stumps move, and Stumps multiply. Spotlights only work when your battery does.
Idle speed is relative.
Shallow water is shallower before sunrise. It is hard to put waders on in a boat. It is hard to take waders down when you've got to pee. Coffee is a laxative. Always carry toilet paper.