Sort your seeds into annuals and perennials, time of year they’re planted, soil needs (rich vs. poor), microclimate needs (sun/shade/wet/dry/wind etc.), transplants vs. direct seeds, etc. Do you see any promising combinations? Perhaps your Arnica may like to grow together with St Johns Wort and Bee Balm, instead of in with the Marshmallows.
Make some lists: What do you have? What do you need to buy for next season? What plants will you start indoors, and what will you direct seed?
Draw some diagrams: where was everything last year, and where are you planting each new friend? How can you rotate your annuals around your perennials? Some people like to use index cards or scraps of paper to do this so they can move them around easily. I use a pencil in my notebook, that way I can refer back to my thoughts later.
This year, as you putter and tend and mulch and hoe and coax, draw pictures of your work. The better your records, the easier it is to find ways to improve your garden’s vitality.