Setting reasonable goals: How much to plant

Today I counted potential yield or perhaps more to the point, counted my chickens before they hatch.

• 12 green tomatoes and a few blossoms on the celebrity and heritage tomato bushes
  
• 5 hard peaches from the 2-year old tree
• 0 raspberries from the 2-year old bush
  
• 0 pea pods down from about 5-6 pods per day from 2 squares
• 0 bush and pole beans from 5-6 squares

In a tiny garden what can be achieved. Including the great wall of lettuce, I have about 50 squares of plantable space almost all of it in containers. What can be grown in this area that will produce a useful yield. So far the successes include:

• herbs: savory, thyme, basil, sage, rosemary
• lettuce especially "cut and come again" types
  

The experiment includes

• beans
• tomatoes
• peas
• baby bok choy
• red chard