Joined a gym, that's right next to where I work, so am actually going.
However I think my workout is a bit haphazard, doing 15 minutes cardio, and then generally doing weights for 30 minutes or so after that. Tried two tactics, one of 3x10 reps at a weight, and recently 4 reps going from 10 to 8 to 6 to 4 on increasing weight for each set.
Basically I have bugger all idea what I'm doing. I'd like to build muscle, and you know, slim down a bit.
So, any advice appreciated! Help a reforming couch potato out!
If you're doing strength training and cardio on the same day do cardio last, lest your legs be jelly. I prefer to do weights Mon/Wed/Fri with a run on Tue/Thur/Sat and Sunday as a rest day.
The 3x5 Stronglifts app I found pretty handy when I was looking for a proper regime, the website is pretty helpful too: StrongLifts: Simple, Effective Strength and Muscle Building
For cardio, get outside. Treadmills are fucking dull. Try the couch to 5k/10k things if you're a complete novice.