Don't underestimate the importance of interrogatories and other forms of written discovery as a way to glean information that can strengthen your case.
Interrogatories and depositions each have their strengths and weaknesses; here are basic guidelines for deciding when to use which discovery technique.
For some communication, e-mail is just the thing; other times, only a phone call will do. As you think about what message to send, consider how best to send it.