Gmail in the library

I'm only a part-time librarian, so the time I'm in the school is mostly spent in the library. Since I'm not able to meet face-to-face with teachers very often due to time restraints, I've been using Gmail in my library to contact teachers to let them know what additional supplies students may need to bring with them to library, to keep teachers informed of new materials that have been added to our collection that may be of interest to them or their grade level, and to get their input on library issues that may affect them. Gmail also makes it easier to keep track of parents I need to email about overdue or missing books. I especially like that conversations are kept in one thread vs. a new e-mail for each response, and I like that I can easily create folders to keep different, important conversations/topics in for quick reference (i.e. I've created a file for all book fair correspondence so I can find it in one click.) Finally, since I'm pressed for time many days, the ease of creating Tasks that need to be completed later is great; I can get them down before I forget while teaching the next class.