Citing correctly and managing your research will greatly assist you in avoiding plagiarism. UC Merced has an academic honesty policy which includes a definition of plagiarism.
Ethically using information while in university will prepare you to avoid these examples of plagiarism (Northern Illinois University).
For more details on how to avoid plagiarism, watch this engaging video from LaTrobe University. Nobody likes a copycat: The ethical use of information < 2 minutes.