Well, I sell a lot of minis. In fact, I have about twenty listings which will begin this Saturday night at 11:00PM. You will see how I list individual blisters. I recommend listing blisters individually along with boxed sets. I also recommend selling similar kinds of blisters at the same time (same manufacturer, etc...) so people will be encouraged to buy several auctions and combine shipping.
If your minis are loose, there are a few I would list individually. Minis like the series 11 from Ral Partha, and minis that are large should be sold individually. If the paint job is really good, I'd sell it individually. Basically, if you think it'll sell for more than $3.00 or $4.00, I'd sell it individually.
If a mini is probably going to sell for less than $3.00, I'd sell it in a group of similar minis. Themes can range from manufacturers, to size, to condition to type. I usually sell six to fifteen minis in a group of loose minis.
Once you list them, advertise in the classifieds here and Dragonsfoot and anywhere else you think it might help. The Acaeum effect is for real.
Take a good photo. If the photo is bad, retake it. If you have a bad photo, it'll sell for much less.
Finally, and this is important, make sure you disclose that your minis may have lead or do have lead if you think they have lead. State that these are items for people over the age of 14. There's probably more good advice out there, but this is a start.

Truth is worth finding and life is too short to work for money.