The SFS basic fitness challenge would be a good place to start. A lot of my fitness workouts are anaerobic and based on bodyweight exercises but I also use kettlebells.
For anaerobic conditioning, I would recommend working on sprints and calisthenics like pushups, squats, crunches and if you really want to go for it - burpees. Look up tabata drills too.
For basic bodyweight fitness training, this blog has some good ideas and there are tons of different workouts.
http://fitness-solution.blogspot.com/
After that it's worth looking at anything Ross Enamait publishes/recommends.