hiya !
I know that I should hard to work.I know.
But I dun know why i can't keep to work in a long time .i really sad.especially busy and the boss here .When i want to concentrate .I feel sleeply and i just want to play and on facebook.i can't keep it.
What method can i use?Can anyone help me?The method should be what i can keep the power to do it and keep it. Thank a lot!