Just need to make up your mind about what your goal is. If building muscle is your goal then you need to look at it in two steps, bulking and cutting. When your bulking you should look to do little to no cardio. In the cutting phase you simply up the cardio. I body build myself. Now it's winter I up the calorie intake dramaticaly (3 - 4000 a day) and do as little cardio as possible. A warm up is compulsory. I do between 5 and 10 minutes on a row machine to get a good sweat on. Your best bet is to look on a good site and decide what works best for you. The best site I've found is bodybuilding.com. A lot of the info you will find contradicts itself, you've just gotta work whats best for you. The best advice for body building I would say is to get your diet dialled in. You can't grow big muscles without big food. Check that site out mate and spend a coupl of hours researchin.