If I'm looking to maintain my weight, I do three one-hour cardio sessions (one being interval-based), two total-body weight workouts (or a two-day split), and one cardio/weight circuit per week.
If I'm doing a strength/muscle building rotation, I do a three day upper/lower body split and three days of lower-intensity cardio.
If I'm looking to lose a few pounds, I do three days of pure cardio (one interval) alternated with three days of AWT or cardio/weight circuits. That's the combination that really seems to blast the fat for me, along with eating clean.
(that's my biggest problem!)
I take an active rest week (light walking, yoga or stretching) once every 2-3 months, and I take a rest day or lighten my w/o's whenever my body tells me it needs it. Classic overtraining signs are boredom, injury, workout avoidance, dread factor and irritability. I've found that I'm much happier and can put much more effort into my workouts when I'm not burning out by working so intensely 6 days a week. If my body says to rest an extra day, I do it. If it tells me to do a lighter w/o when I've got a heavy one on my rotation, I do that. I used to feel so guilty by not working out at the most intense level everyday, but not anymore. Ask yourself what your body's telling you. Do you feel worked out and exhilerated after your routine, or do you just feel wiped out and exhausted? Does your body feel good--do your muscles have that good kind of soreness, or do you have exercise-related aches and pains on a daily basis? These are the questions I had to answer myself, and when I realized that I was not losing any strength and cardio-capacity by allowing myself extra rest when needed, I not only enjoyed my workouts a lot more, but I could put so much more energy into them because I was rested enough to have that energy in the first place!