The same happened to my spiritual routine. I like to go to bed early, listen to one of my favourite speakers for a half hour or so and then read my bible. Sickness, holidays, visitors all challenge what I call my one healthy habit.
I am always amazed at how quickly a bad habit sets in and how long it takes to break and how long it takes to establish a good habit and how easily it can be broken. Nevertheless, I realise how important it is for me to start and maintain good habits.
I know my garden would look mightily sad if I didn't regularly attend it and I also know how I make it harder for myself when I don't look after my spiritual garden. I love Jesus and know that to get closer to Him requires my attention and I can do that best by setting a routine, not out of a religious practice, but a heart felt desire to pursue Him.