If your car battery is dead, call a reputable towing company for a Jump Start. This is much safer than soliciting a jump start from a stranger. The towing company should have proper equipment and training thus eliminating the potential of damage to your vehicle.
Most drivers have had the unfortunate experience to have their vehicle break down and need to be towed. This seems to happen at the most inconvenient time and is never fun to deal with. A typical response would be to call a tow company to take your vehicle to a repair shop.
Another time to consider calling a tow company is when your Keys are Locked in the Car. This is a fairly common incident. The first response would be to call a family member or friend to bring a spare set of keys. However, a spare set is not always readily available. A good towing company will have specialized tools to unlock a vehicle in minutes once onsite.