Something I have aadopted to great success is a pre-chitting your seed before you sow it.
Having read an article a few years ago the Amish use this method and it works.
An example is onions, last year I pre-chitted the seed, 3-4 days and they had sprouted, sown into pots at correct spacing and everyone grew, this method was quicker and reliable
I use a an old chinesse take a way tub, cut two sheets of kitchen paper and place one the bottom and wet it, not soak. Place seed on and place the other on top, dab it down with the off cuts and put lid on, place some where warm, mine go under the bathroom radiator.
Every couple of days check the seed and pick n sow as they sprout. This method means you only sow seed that has germinated