There are entire books devoted to describing the proper foundation for the various sorts of evidence you might need to introduce at trial. Ervin Gonzalez has prepared a list of the most commonly-encountered sorts of foundational problems, with a short explanation of what to do in each situation. Titled "Trial Foundations," it deals with the following issues:
- Business records
- Tape recordings
- Refreshing recollection
Finally, there is a section on what to do if you encounter a new foundational issue at trial and get stuck.