So, what I like to do when I'm prioritizing tasks is to assess the urgency of the task is the most important thing. See if this task needs to be completed before others and that goes hand in hand by seeing if another team member or situation will impact my task and seeing if I have to complete it first before they can do something or vice versa. I also like to consider the impact of my task, how it's going to influence other completed tasks and we also like to regularly assess the importance of the task with priorities and circumstances that may change in the project or whatever I'm working on.