First, add some fuel stabilizer to the tank and run the mower for about five minutes to distribute it through the system. Next, empty as much fuel as possible by using a siphon pump. Run the mower until the rest of the gas is used up.
The extra gas that your siphoned out can actually be put directly in your car, if your mower has the right kind of engine. But be careful, some mowers have 2-cycle engines, which use a gas and oil mix that's not good for your vehicle.
When it comes to your hand-held gardening tools, there's an easy way to make them last. Simply fill a 5-gallon bucket with builder's sand and mix it together with one quart of 10W-30 motor oil. Scrub any rust off the tools and place blade-down into the bucket. This one simple trick will keep them dry and rust-free for months.