There are some specific issues to think through if you're looking to
walk to work or school. Here are a few to consider
Shoes: Are your work shoes
suitable for walking? If not, one option is to carry your work shoes
and change
into them when you get to the office or school. Another is to find a
pair of shoes appropriate for your job or school and which are also
comfortable for walking.
etc. 
to freshen up when you arrive at the
office.