[Danimal16]

A couple of tips that may help.
Plant tomatoes in alternating gardens every year. Refresh the old soil (the internet has many recommendations on this).
Every time you go out to the garden make it a habit to gently touch as many of the flowers that you can, this helps with pollination.
Co plant with herbs like rosemary, sage, basil, oregano, thyme, helps keep the bugs away.

Use calcium nitrate fertilizer.