For the best results when making jam, don't wash the strawberries unless absolutely necessary. Instead, brush off any dirt, or wipe the strawberries with a damp cloth. If you have to wash any, pat them dry and then spread them out on a clean dish towel to dry further.
Wash them in hot soapy water, then rinse thoroughly and drain. Place the jars on a baking sheet to and dry in a warm oven for 10-15 minutes.
We went strawberry picking today, and I immediately thought that I should make some jam with all the strawberries. So I made this and it came out absolutely delicious. I went ahead and added some pectin to the jam to help it gel better (6 tablespoons worth). I also suggest adding a little bit more sugar (1 cup more), but otherwise it's great! - 31 May 2013