When some of your teammates go on vacation, how do you manage your time and prioritize your tasks, especially when you find yourself doing their work?

Thanks 

I have to finish my tasks first then do their tasks but not forever just when they are on vacation 

 The ability to convince is the most important way to communicate suggestions and modern methods

2- Effective communication skills to win the support of the team

you have to organize the work and what is the most priority task even if it related to cover work of someone

It should be manage through the multi tasking skills and must be prioritize the jobs those need immediate attention.

The vacations must arranged according to work tasks and every responsible person have to delegate in charge person in the vacation period.

I agree with what Mr.  abdelghany abdelsalam said.

I think you have to manage your time based on your priorities.

Do Smart Work At That Time. I Have To Finish My Work Along With Team Mates Work As Possible I can Do.

Time management is essential in retail industry nor in any field of a given firm., I ususally manage my time by giving task's to the team in which I required their inputs and I will do the final say on what is relatively essential and discuss as well on whatever is the task's required by chanelling the right rota ahead of time before the staff will take their vacation, 1 month before it's a must that the calendar is planned moreover the rota is forwared in the HR for their review in assurance that the shop floor is covered without compromising with the trading and/or operations., Hence if I find myself doing their work is never been an issue due that in the management side you have to be flexible., a good manager should always knows the operation from A-Z and if the plan has been made ahead of time there will be no risk of having that scenario to be experinced.

This satuation should be manage through multi tasking skills for this you have to organize the work and prioritize the tasks those need immediate attention even if it related to cover work of your teammate.