Derech HaMelech,
So you don’t put your shel yad on the same side every day?
Sorry, perhaps I left out too many words in my previous post, so what I was saying was unclear. I was only talking about taking the tefillin in and out of their bag. What I was trying to say was:
When I return my tefillin to their bag [after shacharis], I place the tefillin shel rosh [into the bag] on the same side [of the bag] each day. That way, [the tefillin shel yad will always be on one side of the bag, and] I will [successfully] remove the tefillin shel yad [from the bag] first the next morning by habit [because it will reliably be on the same side of the bag each morning and I won’t have to think about it].
Better? 🙂