Help yourself! – this English small talk phrase is one of the traditional phrases you’ll find in all English phrase-books, and it’s an encouraging phrase used to let the other person know that they can go ahead with the action in question. Typically this is used as a response when the other person is asking for permission to take something, and then you tell them that they can certainly do it: “Sorry, do you mind if I take this *****e? Everyone seems to have taken theirs…” – “Sure, help yourself!”