My IDEAL exercise routine looks like this:
Monday - Body Step
Tuesday - Body pump or Pilates
Wednesday - Interval running on the treadmill (couch to 5km) plus weights
Thursday - Free style step class
Friday - Body pump
Saturday - Interval running on the treadmill plus weights
Sunday - very occaisionally I'll do a pump or core class but more likely to be veging!

I will pretty much miss at least one or more classes a week but try to go at least 4 times. As you can see my exercise is very gym based so I'm thinking ahead and hoping to be able to branch out eventually into running outdoors and then (God willing) running with a pram like Hoobley can! I'm also thinking about buying a pilates DVD as well.