Donate unwanted books to your local library - even if they can't put them on the shelves, they can sell them to raise money.
If someone you love is going on a trip hide a note or a little reminder of home for them to find in their case while they are away.
When someone's label is sticking out/their top is on back to front/they’ve got something on their face/there’s toilet paper on their shoe etc., tell them!
When you go to a public place, such as a beach, don't forget to dispose of your rubbish in the bins or take it home. Don't leave it behind.
Offer to help someone if you know they have something like a move coming up and you are available, so they don’t feel like they have to burden you by asking.
Welcome your new neighbours, give them tips about the area and, if they are alone, hang out and show them around.