I am using store-bought seeds this year instead of mail- order. I save a bunch of money this way, but we will see if they are as successful. In the past I have spent a fortune on seeds and shipping costs. I have to shop around a bit more to find what I'm looking for, but I'm helping the local economy and saving on shipping fees.
I'm using a soil made specifically for seed starting.
I filled the trays with soil, planted my seeds according to packet instructions, and sprayed them liberally with water. The trays were then covered with their fitted domes and arranged on a table with flourescent lights hanging just above them.
The lights are on a timer and automatically turn on for 14 hours per day. Everyday I water the trays and move them slightly so each side is getting its share of light.