Busy doesn't mean good for all the time but it would benefit to you if you are busy with the right things. Making yourself busy means preparing yourself to find the bright future, planing yourself to reach your goal, and putting pressure yourself to work effectively.
When you were a junior level, most of you might think that you don't have to do a lot of job like your manager or supervisor because your salary is lower than your manager. Anyway, this thought might not correct. You do like this, it means you close your opportunity to grow up already. Because you are a junior level, that's why you need to work harder so that your manager will see your performance and promote you to next level. So "Making Yourself Busy is to Make Jobs for Yourself"
In Khmer word means "ការធ្វើឲ្យខ្លួនឯងរវល់ គឺបង្កើតការងារឲ្យខ្លួនឯង"