Meditation continues to be the most important habit I have and today marks three years of practice.
The practice itself has not changed but I have added longer sessions every three months after a 24-hour water fast. These sessions tend to be strange, trippy and surprisingly consistent regarding the clarity of the closed-eye visual information.
These phenomena are of course a product of thoughts floating by, but they seem to have a certain glow to them that is otherwise hard for me to notice.
I feel that I'm making progress but more than that I've learned the consequences of not practicing. My overall well-being still remains better than a few years ago but it becomes clear that a week without practice is more confused, depressed and more distracted.
The interesting thing is that it doesn't take much to get back on the horse and the aggregated effect of a week or so of practice uses something like mental muscle memory. It's kind of like playing an instrument where accuracy and confidence is dependent on the frequency of practice but there remains some amount of latent skill even without practice.