[Lore]

Caffeine increases your metabolism which could enhance your efforts, but the most important thing is to stick to whatever you do. If you're gonna exercise, don't overdo it; start small and gradually increase the time and reps. Some people mistake extreme pain for burning more fat, but that just means you're possibly injuring something. Don't get me wrong, a little pain is okay... but if you're straining to the point of struggling for breath, stop.

Something you can do to gradually work exercise into your life is to extend that walk home. Instead of immediately returning home after work, take an extended walk for say... 10 minutes. I know you're tired then, but I doubt you'd want to do that before work. That's just an easy first step. Good luck to you!