表达“睡得好”其实很简单：

① I had a good night's rest/sleep.
我睡了一个好觉。

② I got a good night's rest. I slept for 8 hours.
我昨晚睡了个好觉，连续睡了八小时。

③ Did you get a good night's sleep?
你昨晚睡得怎么样？

Sleep like a baby
睡得像个婴儿，睡得香

① I just got a new mattress. Now I sleep like a baby.
我刚买了个床垫，现在我睡得好香。

② I didn't hear any thunder. I slept like a baby last night.
我没听见打雷声，我睡得像个婴儿一样沉。

heavy sleeper
睡觉沉的人

① I'm a heavy sleeper. Nothing can wake me up.
我睡觉很沉，什么都吵不醒我。

② My husband's a heavy sleeper and usually falls asleep with the TV on.
我老公是个睡觉很沉的人，他通常电视开着都能睡着。

Sleep in
睡过头；晚起

① Tomorrow I have a day off so I'm gonna sleep in.
明天我休息，所以我要晚起。

② Sorry I'm late, I slept in. I really needed a good night's sleep.
不好意思，我晚了，我睡过头了，我真的很需要好好睡一觉。

Have a good dream
做了个好梦

Mindy had a good dream last night. She dreamt she got a promotion.
Mindy昨晚做了个好梦。她梦到她升职了。

Power nap
迅速的睡一觉补充能力

I'm gonna go take a power nap. Wake me up in 20 minutes.
我要去快速的打个盹，20分钟以后叫醒我。

Refreshed
神清气爽

① I woke up refreshed this morning. Probably because I went to bed early.
今天早上我起来很神清气爽，可能因为我昨天睡得比较早。

② That nap was just what I needed. Now I feel refreshed.
那个盹我打的真好，我现在感觉神清气爽。

Energized
充满精力

① I woke up energized this morning so I went for a jog.
今天早上我起来充满了精力，所以我去慢跑了。

② How was your sleep? Do you feel energized?
你昨晚睡得怎么样？有没有感觉充满精力？