Ideas for very small yard

Hi there. I am looking for suggestions for "homesteading" on a very small yard in a small town. I am land locked by neighbors, a driveway easement through my property, and a very busy street.
I estimate that I garden on about 750 square feet of the property. I would like to do more, but I have tried things in the past and I feel like there is just no room and it doesn't work out and is a mess.  Any suggestions or ideas? Vertical gardening would be interesting, just not sure how to start, and the pictures I see look like they are for much larger areas.
Here are a few facts:
1. Zone 4
2. Upper midwest state. Pretty good soil.
3. Town won't let me have chickens etc.
4. My available space is mainly in the front yard facing a busy street. It is south facing and gets a lot of sun.
5. Some garden space on the east side of the house gets morning early afternoon sun.

In a perfect world we would be able to move to a bigger place, but that won't happen for a long time. Thanks in advance.

Welcome!  I’m also urban upper Midwest.  Some things I see working for people in my neighborhood with small yards or even just balconies:

- squash and cucumbers grown “vertically” on wire or netting support.  You may need to tie the vines to support, depending on varieties.  
-beans grown in similar manner

These have advantage of adding privacy.

Herbs, berries, and tomatoes  are good because they do not need much space and are high-value, easy to do organic.

Mk Neal wrote:Welcome!  I’m also urban upper Midwest.  Some things I see working for people in my neighborhood with small yards or even just balconies:

- squash and cucumbers grown “vertically” on wire or netting support.  You may need to tie the vines to support, depending on varieties.  
-beans grown in similar manner

These have advantage of adding privacy.

Herbs, berries, and tomatoes  are good because they do not need much space and are high-value, easy to do organic.

Thanks! I do have some metal trellis things set up. I can't wait for springtime.