When weeding a pot of cactus, use tweezers for safety.
When taking long cuttings that can be cut smaller, I use a marker to mark the top. The mark will not hurt the cutting.
Leaves and pine straw help when you're driving through sand. Use your own or get some from your neighbors for a free and environmentally friendly option.
I have a big problem with squirrels, AKA tree rats or varmints, getting into seedlings or cuttings. When I trim the rambling rose I put the trimmings around the babies to help deter them from getting dug up or eaten. Not 100% squirrel proof, but it does help.
I fill empty milk jugs with water to water baskets/plants where no hose is handy. Saves trips into the house or to the hose.
BBQ skewers are the perfect size to stake cuttings and small plants.
If the little girls in your life have outgrown their small hair clips, use the clips to tether plants or vines.
Worn out or threadbare towels can be useful a little longer by hanging them in the potting shed. When you're done working and rinse off the first layer of dirt before going inside you'll have something to dry your hands on besides your shirt. When they get really nasty then pitch them.
When collecting seeds and separating them from the chaff, if I'm not sure I have gotten ALL the seeds I toss the chaff in a corner of the yard. If seeds were left and sprout, then I'm a happy camper and have unexpected flowers to cut.
When I have dried bulbs that do not need stratification, I store them in an empty coffee can with shredded paper until I'm ready to get them going again in spring.
Transfer and store your fertilizer in coffee cans. The fertilizer stays dry and the cans are easy to tote wherever needed to feed plants. For convenience and safety, label the contents of the container!
After re-potting, I set the hose on JET to jet the dirt out from under my finger nails. May not be perfect, but it sure helps!