Many seeds require specific sowing treatments, so follow instructions on your seed packets.
Fill the container with standard soil-based or soil-less compost, level, firm gently and water well.
Sow seeds thinly. Very small seeds should be mixed with fine sand before sowing to achieve better distribution. Sift another fine layer of compost or vermiculite over the seeds. Label, lightly water again and either cover with clear polythene and maintain a temperature of 18ºC or place in a heated propagator.