I think you should exercise more.
I think you should raise your sights. You're underestimating yourself.
2. I don't know if…is a good idea.
Josh, I don't know if that's a good idea.
I don't know if taking a year off work is a good idea.
3. Maybe you should try…
Maybe you should try studying a new skill.
Maybe you should try harder, but not live on your name.
4. I wouldn't…
I wouldn't (= I advise you not to) worry about it, if I were you.
I wouldn't be saying this unless I were sure of the facts.
5. If I were you, I would…
大家有没有听过Beyonce的那首If I Were A Boy：
If I were a boy, I would turn off my phone.如果我是个男生，我可以关掉手机。
If I were you, I would have a try.
If I were you, I would follow his advice.
6. My advice is to…
He's a bit of a bully and my advice is to have nothing to do with him.
7. You ought to…
You ought to respect his opinions more.
You oughta go earlier.
8. Why don't you…?
Why don't you wear shoes with high heels?
Why don't you write out a speech and get it by heart?
9. Have you tried…?
Have you tried talking to them?
Have you tried that new stain remover?It works like magic.
10. Have you thought about…?
Have you thought about what job you are going to do?
Have you thought about using flowers to apologize?