The hasting's center outlined four broad goals of medicine:

The following are the four goals of medicine outlined by the Hasting's Center: (Hanson and Callahan, 1999) 

"1. prevention of disease and injury and promotion and maintenance of health; 
2. relief of pain and suffering caused by ill health;
3. care and cure of those suffering from a malady and care of those who cannot be cured;
4. avoidance of premature death and pursuit of a peaceful death."

Source: Health Care Policy in an Age of New Technologies (2002) by Kant Patel and Mark E. Rushefsky. 

You should never redesign your experiment. try and see what in your experiment you made a mistake on or try and test your experimemt with somebody else. see if they get the right results.

There are many you can go on and ask boring questions about being bored when you’re bored : )