Quickest way to cool down is run a tea towel under cold water, wring out and twist and place around the neck of the person who needs cooling down or yourself.
At the beach, remove sand from feet with a liberal sprinkling of baby powder before putting on shoes etc.
During hot weather add water to your dog or cats food to water it down and provide extra hydration. A little or a lot depending on your pets preference. It's massively helped one of my many dogs as he turns his nose up at drinking water.
A low growing clover is a great way to transform your lawn as it stays green, doesn't need cutting as frequently and is bee friendly.
Keep insect bites at bay by eating a lot of garlic.
Add a few drops of moisturiser to a heavy foundation to make it a tinted moisturiser.
Vaseline on fingernails at bedtime makes the string and supple.
Save money on buying expensive shrubs from garden centres by taking cuttings when you're out and about. Retail parks with established plants are good for this. Seek permission of it is from someone's garden.
Buy a roll of cheap wallpaper for young children to use as drawing paper on the reverse side. It's great to get them to lay down on it and you draw around around them to make an outline for them to colour in or glue crafts bits on etc. Cheap and cheerful entertainment.
A couple of drops of Fairy washing up liquid in a spray bottle of water is great for a quick clean in the inside of your car using a cloth or sponge. It leaves your windscreen clear and streak free if you use a dry cloth afterwards.
Much nicer than citronella is Turkish lemon cologne which can be spritzed to repel insects, used as room and soft furnishings freshener, used on hair as and spritzed on skin to cool down and repel midges etc. It also repels nits in children's hair.
fragrance oils are cheap and last longer than regular shop bought perfumes. Al Rehab make roll on bottles which last ages.
Poach an egg by cracking it into a silicone fairy cake or muffin cake mould and placing in water to boil as it will float and cook the egg evenly.