How many seeds should I plant?

Colleagues, 

You can tell spring is coming because I’m starting back with garden analogies!
 
Yesterday I bought several bags of soil, brought my seed trays and seed into my greenhouse, and began planting.
 
I had envisioned filling the greenhouse with newly planted trays of all kinds of produce. As I began, I realized that I really didn’t need that much. I already have some lettuce and spinach going. Much of what I want can be planted in the ground in another week or so. I had also already started some cherry tomatoes, and how many of those do we need?
 
I wound up planting more than I needed to, but it was still only half of what I had imagined.
 
So, what happened? 
 
I got caught up in the urgency of starting the garden without really thinking about the specific outcome I wanted. That sense of urgency led me to buy more soil and plant more seeds than I really needed.
 
That is what urgency does. It interferes with our ability to invest in what is most important.
 
Do good and be well,
 
Frederick