Re: strength training-how often?
You might want to increase the weight and do lower reps to see some muscle tone. You will not get bulky if you move away from the little weights. If you can do "high reps", (ie. 15+ reps) then you are using a light weight. Keep it to a range of 3 sets of 10-12 reps per exercise, meaning that doing more reps than that is difficult or impossible. If you do light weight - high rep, it is more of an aerobic activity and will burn more calories/fat, but won't do much for actual muscle tone.
You cannot work the muscles every day. Well, you can, but if you don't allow a day for recovery, you will *lose* muscle, and that's contradictory to your goals. If you need to maintain a daily routine, use "off" days to do cardio. Keeps you in the groove without sacrificing your progress.
Keep your body lean, your blood clean and your mind sharp. -Rollins