A lot of seeds for plants like tomatoes and chillies are very small and require careful planting. There are a number of tools and gadgets to help with this. It is better to find a friend with good eyesight. This is my friend Molly, she is from Australia and has very good eyesight.
Small seeds should be lightly covered with compost and the surface mist sprayed. The finished pots are best covered in plastic to retain moisture.