Routines are good in terms of providing you with a structure and discipline to make you follow through on your plans.
However, once in a while it is good to do something completely different. When you do that you will find a different part of your thinking will emerge, enhancing your creativity.
You could do this ‘out of routine’ activity once a week to balance between your discipline approach and your random creative approach.
There is no one single approach that responds to one and all. You have to try different approaches until you find one that suits you the most.