Learn English – Idiom for someone who is in good position/mood

What about:

You can't go wrong with classic, as a general statement. It could be used in sentences like:

• you cant't go wrong with a classic suit, or a classic restaurant. It depends on the context you have in mind.

I think the most common phrase I hear that works for good and bad is karma (is a bitch/beauty).

(in Hinduism and Buddhism) the sum of a person's actions in this and previous states of existence, viewed as deciding their fate in future existences.

A common set of idioms to reflect the results of bad/good karma.

• what goes around comes around
• you make the bed that you lie in
• you reap what you sow