Jules, Napier.

Save seeds from supermarket or market purchased vegetables. If the seeds are moist such as tomato, pumpkin etc, space them out onto handitowels or toilet roll sheets. Write the date and variety on the paper. I love checking out farmers markets for unusual varieties of vegetables that contain seed to grow. You get to have your cake and eat it too! I always have small ramikins on my kitchen windowsill to scoop seeds into when preparing meals. Once dried you can roll up, wrap in tin foil and store for the next season. When planting time comes simply unroll and lay onto a seed raising container (cut paper to size if required) and cover with another layer of potting mix. Plants will grow well spaced.