While most of us have been taught to have a perfectly clean golf course look when getting your flower beds ready for spring, another option is what they call Chop and Drop. The video below shows how they do this at Lurie Garden in Chicago. The only problem with this is that it looks quite messy.
In a city subdivision you might want to try a modified chop and drop which is what I do at the Whitecliff Garden. In the front which is visible to the public, I have a clean look which I cover with new mulch. But a couple of feet back I take out the large pieces of dead material, but leave the smaller leaves and twigs on the ground. This provides organic material to help feed the garden during the year.
Ideally your garden might look like this later in the year.