I usually publish 5 days out of every week. I, too, notice a drop in the number of hits I get when I skip a day (or two).
What helps me keep on track is having a set topic a few days a week. For example, on Fridays, a friend and I do a "Friday Firsts" segment on our respective blogs. We write about our first ______. Today, for instance, we wrote about our first 'time.' Juicy. LOL. On Saturdays, I like to post my food menu for the upcoming week, and on Sundays, I do a round up of other sites I've discovered, and I call those posts my "Sunday Drive" posts. (Those aren't written every Sunday... When I've compiled a list of other site/blogs that I enjoy, I write a mini review of the sites, link to them, and shoot the blog owners/authors an email to let them know I've 'featured' them on my blog).
If you'd like to see my blog, you can get the addy from my profile here on Mothering. I have an Amazon link on my blog, so I don't think I can link to it here.