This is likely the simplest time management strategy you are likely to come across. Time Management really can be as easy as ABC. Here is a nice, simple strategy I learnt a few years ago which I have nicknamed the A,B,C Plan.
Prioritise and categorise all your tasks into 3 levels:
A - Critical - This usually includes tasks given to you by your boss.
B - Less Critical - This usually includes tasks given to you by your team or business.
C - Non-Critical - All other tasks.
Complete all category A tasks in order of best priority.
Complete category B tasks next in order of best priority.
If time allows, complete all category C tasks in order of best priority.
And remember not to beat yourself up when not all tasks are done. Nobody ever really finishes everything in business. It’s all about prioritizing.