When most people meditate they are looking to take their mind to a calm, empty, peaceful nirvana where they can escape from the thoughts and concerns of everyday life.
What I do can possibly be classed as the opposite, but I've found it to be something very valuable. If you take just 20 minutes out of your day to lay down alone in a quiet room, with no distractions, it's amazing what you'll find out about yourself. Rather than escape from conscious thought, typically the most important things on your mind and in your life will come to the forefront of your consciousness.
Sometimes walking out of that room can trigger life changes. Stop pretending that you like your job, stop pretending that you love your partner, stop pretending you're not sick.
Meditating on life, as opposed to away from, can be an interesting way to go.