Get a new address book!

...and then, in the process of transferring your contacts from the old one to the new, give everyone a call. It's a perfect excuse to resume contact with those we haven't spoken to in years, it saves wasting paper and postage on a Christmas card that may never arrive at its destination, and it means you can safely put the old one in the recycling.

Give someone a lift!

Even if you don't know them that well, there must be someone you drive past on the school run, or in the rush hour, that you know is going your way...pick them up, physically, and you could be restoring their whole faith in humanity.