When you receive your assignment question, ask yourself:
Most assessment tasks will have a marking rubric or guide which will tell you how much of the assignment's total grade is allocated for each aspect of the task. Use the rubric as a guide as to how much time to dedicate to each portion of the assignment.
For example, your assignment rubric might say '30% of marks for evidence to support claims' and '10% for accurate and consistent referencing'. Although accurate referencing is important, for this assignment you should spend more time on finding evidence to support your claims than on referencing.
The subject site in Canvas will tell you:
This video will help you:
Academic Skills' time management resources page has tips and tools to help you plan your week, assignment, or your whole semester.