Well, first assumption is you are healthy. Other than that, get it frozen ASAP. I use two of those 2oz Nalgene straight sided jars: [
I cum in one, then immediately (less than a minute) take it to the freezer and pour it into the other, which stays in the freezer full time. I could just cum straight into the one in the freezer, but there's no porn to watch at the freezer...

But I transfer it so quickly there really is no difference. When the one in the freezer gets full, I run hot water around the outside of the container for about 30 seconds, just enough to free it up, then I transfer the block of cum out and vacuum seal it with a FoodSaver and put that in the freezer, and continue the process. Then I thaw as described below.
The key things are: 1) your cum is healthy in the first place, 2) you freeze it immediately, 3) you keep it as sealed as possible from air 4) never let it thaw until ready for use, and 5) thawing either needs to be very slow but at safe temperatures, such as in your fridge, which will frankly ruin the quality, or quickly at warmer temperatures but obviously needs to be thawed and used quickly both for safety and quality.
We've thought about sharing, but we've always shied away from anything that shows her face, even if its just the lower half of her face. Maybe some day...! Would love to start sharing again, but since we never shared her face, we felt a little out of place on this forum, being a facial oriented site. That said, we did get a lot of love from everyone back in the day!