deal with a problem when it is small.
Nip in the bud.
As right as rain.
to be completely different altogether from smth or smn
never
Bob's your uncle!
A different kettle of fish
Do smth slowly and carefully.
easy does it!
to be right up one's street
Be in good health.
The second Tuesday of the week.
to be well suited to one's tastes, interests, abilities
never (is usually used in a sarcastic way)
That's it!
When two Fridays come together