Setting up a highly personalized drip marketing campaign at specific intervals or points into a customer's experience with your brand can be not only highly critical to keeping them engaged - it can show them that you care and help them discover more of what your product has to offer.
You can use a drip campaign to:
It's important to target messages against usage (10th session, 20th report, etc) rather than just time (e.g. 1 day, 2 day, 7 day). App usage and feature usage give you far better context for when to trigger messages.
When asking users to do something that benefits you (e.g. tweet, like, mail a friend) always pair the request with a moment of value e.g. "You've tracked over 10K hours! We'd love it if you…" or "This was your 10,000th message, why not…" - they will be much more likely to take this kind of action if they are really happy with your product or your create a moment of serendipity.