I love this cartoon by Gary Larson (Far Side).
If you think you're getting your message through to your supporters... think again!
You're missing big opportunities if you say to yourself (or to your marketing vendor), "We're not going to do that campaign again. We already did that."
The truth is... you MUST "drip" your messages over and over and over and over and over again. That's just the way it works. Consistency is key. Repetition is essential.
Don't kid yourself. You simply have to repeat your messages if you want to break through the clutter and have them heard and acted upon.