Most students view siting work as 'a pain in the butt'. How do you feel about it? Is it necessary? When is it appropriate to cite work? What's the importance of it?

I know it is necessary because it is how you sail away from plagiarism. I do not like doing it because I have to go through a lot of work.  I have to dig through each website to find the information required to cite a source. It is appropriate to cite your work every time you use information that is not yours. It is important because if you do not cite your sources than that is plagiarism.