I like peat pellets; I like peat pellets; see this post for a pic. They come in a little plastic greenhouse, and you pour warm water in until the pellets have fully expanded from their dried disc form. You poke the seeds in, keep it watered, and eventually they start sprouting. Once they're big enough, I pot them in fibre pots with potting soil, and then move everything out to the garden in late May/early June. But bear in mind that I make no claims of expertise here.