Let off steam 发泄

Meaning: to release emotional tension

Example: Outdoor activities enable them to get some exercise and let off some steam.

Put my feet up 放松

Meaning: to relax, especially by sitting with your feet supported above the ground

Example: After a hard day's work, it's nice to get home and put my feet up.

Wind down 放松

Meaning: to slow something down; to make something less hectic

Example: A glass of milk can probably help you wind down.

Get into 喜欢，感兴趣

Meaning: to become involved in something; to develop an interest in something

Example: If you get into a particular kind of work or activity, you manage to become involved in it.

Put off 使反感；使对…失去兴趣

Meaning: to feel intense dislike or distaste

Example: She's very clever, but her manner does tend to put people off.

Catch up 发现

Meaning: to find out about things that have happened

Example: We spent the evening catching up (on each other's news).

Chill out 冷静下来

Meaning: to spend time relaxing; to relax and stop feeling angry or nervous about something

Example: You need to chill out.

Settle down 冷静

Meaning: to become calm or composed

Example: When I am on the train, I'll settle down with a good book.

Pick up 学会

Meaning: to acquire knowledge or habits through practice or experience

Example: I picked up a lot of knowledge about music from my brother.

Blow away 使…印象深刻

Meaning: to impress somebody a lot or to make them very happy

Example: That concert blew me away.