How to Complete Something Within Time Period?

Well the main point here to complete your task in time is that your concentration and yes while your doing something on a task to complete then firstly what you need to do it suppose it is time 3:00pm then set a time in your mind that you have to and you have to complete it by 4:00pm and while in that 1 hour you should not even drink water or anything till your target is achived, and as well as your mind should not be distracted for even a second because a second could cause you 30mins late then what you had targeted.

Suppose that you are revising for your science exam which is tomorrow and you havent read even once in the whole day then that what you do is go into a room where no one is there it is completely silent sit there and relax take your book look at the time set it in your mind that you have to complete so and so lesson in 1 hour or 2 hour, I would really prefer 1 hour because the shorter the time is the more your concentration is. Beaware dont take your time less then 1hour or i am pretty sure you would be finding some trouble

Hope you like it =]