Store in a dark place. When I was working with the blender, I found that it was slightly easier if I poured most of the chopped cranberries into the steeping container, and then washed out the remaining bits from the blender jar using the vodka. After steeping, take the jar out and line your big funnel with your cheese cloth. Pour mixture through cheese cloth. Filter again through this funnel, lined with a coffee filter or paper towel, to get all the lingering solids out.
Paper towels are more porous and let larger particles through, but it goes an awful lot faster.
Occasionally, you might also see some extra cloudiness at the bottom of your bottles after a few weeks. Shake moderately before serving to redistribute the material. Before bottling, clean the heck out of your bottles, too, for precisely the same reasons you cleaned your jar. Pretty bottles aren't necessary, but they do tend to make your audience more disposed to liking the contents. Pour the liquid into your bottle, cork, and you're done.