I'd say the precautions vary by the type of field you are looking to enter. Medical, finance, and other fields all have different precautions you'd want to follow. I'd recommend searching online the type of field you'd like to go into and what it involves. If it's a physically demanding job, there may be physical precautions to take. If it's a medical field, you may need to keep an eye on your health. If it's a very stressful job, you might have to make sure you watch how stressed out you get. Understanding your field will give you a better idea on the precautions to take and prepare for that field.