Sure!
First off, Don't study if your tired/sleepy, it makes things worst. Before studying, always take a good small nap.
Second, don't dose off into space, instead of working time will pass faster then you think. so always stay concentrated.
Third, take your time! If you rush to get the studying over with, so you go out or text your friend, might as well not even study, because your going to fail.
Last but not least, Take breaks in between your studying, Don't get it all in 1 hour and think your good to go.
Hope I helped!
And good luck on the studying! :)