Check for obstacles laying around the shop floor. Watch for potential fire points. Dispose of soiled rags properly. Make sure the fire extinguisher is in working condition. Take time to make sure all you cutting blades are sharp. A dull blade is a dangerous blade. Check electrical cords are still in good condition and replace or repair as necessary.
The best safety tip is to think. Think about what you are about to do. Are you using the safest method? Do you even know the proper use of that tool? If not then read the manual.
I want all of you to enjoy making your holiday projects. A few minutes thinking about safety might just prevent an accident. Your holidays will be much better if you still have all your fingers to open presents. Be smart and be safe.