“Easy come, easy go”

“A mixed bag”

A combination of good and bad things.

“A double-edged sword”

Something that has both advantages and disadvantages.

“Big picture”

The overall situation, not small details.

“Heavy going”

Difficult to do, read, or understand.

“Breathe easy”

To relax after worry or danger has passed.

“Go without saying”

To be obvious.

“Not my cup of tea”

Not something one likes or enjoys.

“Go hand in hand”

To be closely connected.