That is one thing I picked up from here. I always respond to texts almost as soon as they come in. I leave hers for at least 3 - 4 hours before responding as it also gives me the time to clear my emotions so that I respond without them getting in the way.
Start trying to mix it up a bit. Sometimes respond in 90 minutes or so. Sometimes several hours. Some evening ones, not until the next morning. Start to begin them with "Sorry, just saw this," or "Sorry -- just got your voice message. I was out."
