Check the expiration or sell-by date
Look for cracks, leaks, or unusual slime on the shell
Place the egg in a bowl of cold water
If it sinks and lies flat, it is likely fresh
If it sinks but stands upright, it is still usable but older
If it floats, discard it
Crack the egg into a separate bowl before using
Discard it if it smells bad
Discard it if the yolk or white looks unusual in color or texture