Posting holiday snaps and sharing your location on social media like Facebook, Instagram and Twitter while you're travelling could invalidate your home insurance as it shows that your home is likely to be unoccupied. If criminals find out your address, they could try breaking in.
Sharing details and pictures of expensive new purchases on social media can not only be seen by your friends and followers but can be shared and retweeted so strangers see them. Review the privacy settings on your social media accounts and make sure only trusted people can see your posts while you're away. Or just consider not posting holiday pictures until you get back.
Vigilance is the watchword: a picture online is not the same as a framed, family snap on the mantelpiece at home, only to be seen by people you know well.