First, I would refer you to answers I've given in this form addressing issues of the environment, transportation, and the water and sewer systems.
The 'traffic problems' in Medford are really parking problems, especially in South Medford, because there is no municipal parking lot. So-called 'little' issues like this can have large consequences when neglected. So I think the first thing we have to do is re-assess our use of certain public spaces and how to re-form them to serve the people. For example, the Curtis Tufts School has roughly 48 students. We could relocate the programs placed there to Medford High School and re-cast use of the space. We could open the Tufts School parking lot as municipal parking and either sell off the school or transform it into a badly needed artists' space. The latter would create many revenue opportunities through art classes, art exhibits, and live performances.