I like to start Rudbeckias early. They usually need cold stratification.
(The Eucalyptus will be in the next post.)
I label paper towels, using a sharpie. Let it dry. Then run water over the paper towel, squeeze it out so they are fairly damp but not dripping. Sprinkle on the seeds. This is a lot more than I'll know what to do with, if they all grow.
Fold it over twice, so seeds don't fall out.
Then place into labeled zipper sandwich bag.
I label the paper towel so I can place more than one variety into the bag, to reduce plastic use.