Given the dry weather, the grass in the back garden is looking a bit sad. Its particularly bad on the south side, which gets most sun, especially under a 12' acer which must be sucking the ground dry.
I decided to start using waste water from the kitchen to try and improve things. Besides using dishwater (never succumbed to getting a dishwasher) I left a bowl under the sink to catch water that's usually wasted when swilling things, washing hands and running the hot tap waiting for the water to run hot (the utility room has hot water almost instantly, but the kitchen must be a bit further along the plumbing run). Over the last 3 or 4 days I must have caught 4 or 5 gallons a day that would have otherwise gone down the plug hole. Early days, but hoping for greener grass shortly.