Be sure you understand your instructor's expectations for your work. Be cautious about using notes belonging to other students , even if you are in the preliminary stage of writing your own paper or doing your own problem set. Keeping others' ideas distinct from your own is an important way to protect the integrity of your own academic work and to avoid unintended plagiarism. If you do not understand an assignment or need additional time to complete it, ask your instructor . Students occasionally, out of desperation, make the wrong choice by plagiarizing their sources rather than requesting an extension.
Proper citation takes time.
At 5 a.m. after an all-nighter, you may not be thinking clearly enough to make the right choices about properly acknowledging your sources. Not to mention that you are hardly likely to be doing your finest work at that hour.