The most important thing is probably going to be having good control over the final wash and drying of the film, when the emulsion is sticky and will pick up any impurities. Since I started processing at home, and not in a communal drying cabinet, my negatives are much cleaner. So, here is what I suggest.(posted 8714 days ago)The final wash is best done in distilled or carefully filtered water. I add Edwal LFN to this rinse, many use Kodak PhotoFlo.
This next step is optional, but can speed up drying time a lot. I got a lettuce-spinner, "salad-centrifuge" kitchen accessory, and spin two reels, placed opposite from each other for balance, at a time. Time: approx. 1 minute. This removes most of the surface water without having to touch the film at all with sponges,etc.
At the start of the developing process, I run hot water in the bathroom shower for a couple of minutes to temprorarily humidify the air and cause dust particles to settle out. I hang the film up to dry in the shower stall, and close the door for a couple of hours. At this point, check the film. It will usually be ready to put in storage sleeves.
Since I started doing this, the amount of spotting that I have to do has reduced almost to nothing.