There are many sites on undergraduate writing out there, some amazingly helpful, some less so. The Library of Antiquity: Tips and Tricks for the Study of the Ancient Mediterranean is one worth looking into. The blog is written by a grad student and a visiting professor at York University. Its aims are to provide resources for study of classical antiquity, which is cool enough, but they also introduce research tools and best practices for students. For example, check out their advice on starting major papers, like senior sem, the expert post on academic writing, or their posts on some of the trickier online resources, starting with JStor and working up from there!