Your mower might not need a new sparkplug every season, but changing it is a simple job, and doing it every year ensures you won’t forget the last time you replaced your sparkplug. Sharpen mower blades once each month during grass-cutting season. Have a backup blade (about $20) so that a sharp one is always on hand. A well-maintained lawnalmost always returns 100% or more of your investment. Ahhhh, that sensation of stepping onto a freshly-mowed lawn sans footwear. Especially when you realize that a lawn you love is also one that’ll pay you back when you sell.