For seedlings indoors or under glass that gets a bit spindly I have occasionally used some dry sand sprinkled between the seedlings, just to emergency stabilize them. This way I can wait to transplant them until they have grown a bit bigger and are easier and safer to handle.
@Weedwhacker for direct sowing brassicas outdoors I make a deeper seed drill than needed. After I have sown the seeds I only cover them to correct depth, I don't fill the drill completely. Later on when they have emerged I can just use a hoe to fill the drills up fully at the same time as I remove weeds. With very little effort the plants are now at correct depth and stabilized so they won't flop over. As a plus less watering is needed during germination as the soil is more moist in the bottom of the deeper drill. Of course if one anticipates extreme amounts of rain before the seeds have germinated one could run into trouble on heavier soils, but it has never happened to me on my light sandy soil.
