You should wash your hands carefully, exercise, eat and sleep well.

你应该认真洗手，锻炼身体，吃好睡好。

youdao

You should wash your hands first.

你应该先洗手。

youdao

You should wash your hands.

你应该把你的手洗了。

youdao

Cord Jefferson surprised me by writing an anti-soap screed, since he recently wrote an evidence-based explanation of why you should wash your hands every time you use the bathroom.

FORBES: Science and Skepticism: The Importance of Evidence-Based Health Tips

You should wash your hands for at least 15 seconds every time you are near - every time you come in contact with something that might possible have the germs on it.

NPR: Tracking a New Strain of Drug-Resistant Staph

Either way, when you are sick with a virus whether it is flu or norovirus, you should stay home, isolated yourself from others, wash your hands frequently, drink plenty of fluids, and watch our coverage of the outbreak on TV.

FORBES: Norovirus: The Bug That Is Presently Making So Many Of Us Sick