In reply to DreadyCraig:
Depends what kind of thing you're into, and what kind of long term outcome you want. For just looking better and feeling a bit stronger, the two key things are diet and strength training. There are different ways of getting there.
If you're motivated to move your lifestyle on a bit, then read 'Racing Weight' to deal with diet (or google Josh Hillis and download some of his stuff), stick with doing some cardio that you enjoy(eg get out running a couple of times a week), buy a basic bodyweight strength book like Pavel's 'Naked Warrior' and start doing some of the workouts a couple of times a week.
There are lots of alternatives to the Pavel book if you can't stomach all the Russian secret service hokum, but many strength training books will (rightly) get you in a gym squatting, pressing etc. This is the best way to achieve your goals, but is probably more of a commitment than you have suggested you can make (which is totally fair enough).
If you don't want to go to a gym, and would prefer something a bit more motivational and structured for a 'quick hit', don't dismiss the big commercial workout packages like PX90. It's designed to do at home with minimum kit. If you want something disciplined to jolt you forward, these kinds of packages will give you all the information you need and can be really effective. I know both beginners and experienced sportsmen who really like the programme and got good results. The downside with these programmes is that it can be hard to stick with them, and you still need to address the long-term lifestyle issues. On the other hand, if it gets you in shape and gives positive momentum, stick with it.
Bear in mind that all of the above is linked to your goal of losing fat and gaining a bit of muscle, and assumes that you don't want to spend hours reading training blogs and getting bogged down in arguments and disputes.
You will get a million different answers. They are all right. The approach that will work is the one that you actually carry out. Find something for diet and something for strength/training, and stick at it for six weeks. Then evaluate.
Good luck,
Mark