Careful

A man cannot be too careful in the choice of his enemies.

after careful consideration

Be careful [about/of] what you say to him

Be careful with the glasses

Be careful you don't get sunburned.

Be careful, the plate's very hot.

Be careful!

Careful is my middle-name

careful packing is essential

He is very careful with his money

He was careful not to touch on this subject

He’s always careful to look after number one

If you can’t be good, be careful

She is careful about what she eats

The boss is rather irritable today. Be careful not to put his back up