Here's a link to "The Sinkhole Syndrome," an article by Dr. Don Whitney. Great material for the kind of regular spiritual check-ups we should engage in.
A couple of quotes:
"I'm sure you're already familiar with many factors that undermine intimacy with Christ. Realize that it's almost certain that the 'time-thieves' trying to steal from your time with God will only increase as the years pass. My hope is that this article will alert you to this subtle, creeping tendency so that it won't overtake you."
"Resolve never to let your daily life keep you from Jesus daily."