Coat hanger and slim-jim videos make car entry look easy. In practice, both damage the wiring inside modern door panels. Door lock motors, power window relays, and airbag wiring are all in the path of a slim jim.
Smashing a window seems extreme but is sometimes the cheapest option compared to repairing wiring damage. The cost order: professional lockout ($100) < small window replacement ($150–$300) < door wiring repair ($300–$1,500).
Pouring hot water on a frozen lock won't help — the water refreezes in the mechanism within minutes. Use a lock de-icer or move the vehicle to a warmer location.
Lubricating sprays (WD-40) in lock cylinders attract dust and gum up the mechanism over time. Use proper graphite lock lubricant instead.
Don't pay someone to 'tow your car to a locksmith' — the towing cost adds insult to injury when a roadside lockout call costs the same as a typical shop tow.