What are the tasks that your boss or staff asks you to do that you believe is beyond your job description?

It's easy to believe you're worth more, especially if you feel as if you're giving110 percent every day, but you need to demonstrate this objectively by assessing your worth against that of others in the same industry.

Manage it.
The bottom line is that you have succeeded in making yourself both valuable and popular.
This position actually gives you a little power.
People tend to be slightly more respectful and considerate of others when they need them.
So feel free to push back a little bit and turn down those extra requests if you really can’t handle any more on your plate.
But as long as you can shoulder the burden, do beyond your job description,go the extra mile

To come late to office because i was very late at work yesterday

Evaluate all the staff works helps the management to achieve more progress in the common work.
co-operate with the staff to provide good services to the employees.
when we put objectives in our work as weekly objectives or monthly objectives and success in achieving100 percent from the required objectives.
make all the staff working as a team work ( one hand can't get all the works ).
Flow charts is most important to keep all the staff running in a systematic work.

Personal requests which have nothing to do with work but boss or staff want done during working hours.
If your job description unfortunately has that ambiguous statement 'and to carry out miscellaneous duties etc' a boss/staff can sometimes get away with asking for things to be done which are unreasonable, no time has been allocated to it and is not clearly identified and recognised.
The decision is yours to take.
Note: There is only100%.
When giving110%, yes you are giving more but only getting90% back or only90% left of energy/time left to give for any given task.