1 Make studying a regularly-scheduled part of every day. 2  Study difficult subjects and those you do not find very interesting first, when your energy level is higher.  Be aware of your best time of day when you are the most alert, and use this time for studying.
Loading ... about 2 days contents of a 250ml cup of coffee. It only takes you two hours to process it trough your system if you weight 200 lb, you will loose 50% of it on your first urine, but it does not clear completely out of your system for about two days.
How long does it take for caffeine to make an effect on the body? I've heard that if you drink coffee it takes about seven hours for caffeine to really take effect.That's why it's not recommended after 2 P.M., because it can affect your sleep. And if you are sleepy, a cup of coffee will not help.ow long does it take for caffeine to make an effect on the body? I've heard that if you drink coffee it takes about seven hours for caffeine to really take effect.