2023 - What I sowed today

What do you all use to mark your outdoor sowings? Last year, I mostly used little markers made from old yoghurt pots and similar, but my garden is quite exposed and the wind moved them around. I have some slate markers, but it's hard to write on them clearly, the chalk washes away quite quickly, and they snap very easily. I'm currently marking the corners of blocks where I've sown things using twigs, but as I get to the point where most areas have sowings, that's going to become less clear. Even now, it doesn't tell me what is sown in which block. Maybe I should draw a garden plan and mark sowings on there? But I can't do it outside in the wind and I may have forgotten where I sowed things by the time I get inside!