A simple and adorable solution to overwatering your plants? The rubber squeeze flower sprinkler.
It doesn't hold much water—around nine ounces. But for some plants, less is more. Put the sprinkler under water and squeeze the rubber part to fill it. It'll run you $13 plus shipping, and hopefully save you from killing more plants with that brown thumb of yours. [Manufactum]
A Squeezable Watering Can Is a Life Preserver for Drowning Plants