Kim. Different plant seeds have different requirements. Some need light, some need dark, some need damp chilling (stratification) before they will germinate, some need the seed coats abraded (scarification), some benefit from soaking first, some are negatively affected by soaking first, some need alternating temperatures, and so on.
It depends on what seeds you want to start, what their specific requirements are, and what you might have already done to break any seed dormancy (seed dormancy will prevent them from germinating even in otherwise perfect conditions) etc. Hope I haven't made this sound too complicated because it's not really, it's just a question of finding out what works best for the plant seeds you want to start.
If you let us know what you want to grow I'm sure we can help more