Here's a rough layout of my weekly workout schedule when I'm at college (I don't utilize the gym when I'm home):
Sunday: 30 minute cardio (running, elliptical, or bike)
15 minute core workout (crunches, flutter kicks, etc.)
Monday: 10 minute warm-up on the treadmill 30 minutes working my arms (I use all the cool machines that I don't know the names of for weights training with my arms) 20 minutes cardio
Tuesday: 60 minutes of Group Kick, a high cardio class that works out arms, shoulders, core and legs (pretty much everything)
Wednesday: 30-40 minutes on the treadmill 25 minute core workouts
Thursday: 35-50 minutes on the treadmill 20 minutes working on my legs (again, sometimes using the cool machines that I don't know the names of)
Friday: 10 minute warm-up on treadmill 15 minutes on arms 15 minutes on core 20-30 minutes cardio
Saturday: REST (it's well-deserved!)
Note- I'm a runner; not everyone finds it as important to incorporate cardio in their daily routine. I'm also not working out to lose weight necessarily, but to continue to be fit and healthy.
I do think it's smart to mix cardio and strength training in your weekly routine, though. It's also not a great idea to target the same muscle group days after day, they need time to rest. Try every other day or every two days (like I do).
Pay attention to my Monday and Friday routines. I read once that the best way to go about a full gym day (cardio and weights) is to begin with a cardio warm-up, then do full weight training, and finish up with your cardio workout. The warm-up, obviously, warms you up and gets your body moving. I read that you end with the cardio workout because by that time your body is ready to burn fat.
Oh, and don't forget to stretch and hydrate!
Is your weekly workout similar to this? What