Easy to unglue stamps and envelopes - Put in freezer for a few hours then flip off with knife blade.
Get water out of your watch - Strap watch to light bulb, turn on for a few minutes. Water deops will form on glass. Open up and wipe off.
Easily untie a knot in a chain - Cover the knot generously with cold cream.
How to remove staples - An old nail clipper works fine.
Make dry cell batteries last longer - Seal in plastic bags, wrap in aluminium foil, keep in refrigerator.