I keep a three-ring binder on my desk with a page for each student. The page contains important info on each student, like parents' names, work phone numbers, siblings in the school, and such. I also use it to record any contacts I have with parents, documenting a phone call or visit/conference, a paper sent home for parent review, etc. This serves as a reminder each time I speak with a parent and provides a consistent place to keep records. It is time consuming and requires good organizational skills, but the information is invaluable.