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