Wearing talis and tefillin to shul
The Zohar emphasizes the importance of donning talis and tefillin at home and then going to shul wrapped in one's talis and crowned with tefillin. When possible, it is appropriate to do so. One exception is someone who leaves his house before the time for putting on tefillin. Someone who must pass areas where tefillin may not be worn (e.g. foul-smelling) should don his talis and tefillin in the shul's lobby. If it is not possible to put them on outside the shul, one can put them on at home and keep them covered when passing through a foul area. Contemporary poskim discuss whether passing the garbage receptacles in modern cities presents a problem.
(סעיף ב וס"ק ח; ביאורים ומוספים דרשו, 13-14)