Making Suggestions

Let's have a beer or something, shall we?
    Yes, let's go.
    Shall we go out for a walk?
    Why don't you take some medicine?
    What about going window shopping?
    How about going out for dinner?
    I'd like to suggest that you take a few days off.
    You'd better /ought to /should explain it to him.
    Can I offer you some advice?