A.L.
Try this. instead of trying to eliminate what you might consider bad things, begin to ADD in positives. e.g... can you get pedometer and begin to measure how many steps you are taking each day (the recommended is around 10,000) sounds like a lot but that for me works out to be about 5 miles.. believe me, those steps add up.. By using the pedometer (which requires no effort) other than you walking around, this will allow you to begin to gage your "true" activity level.. Try using the stairs instead of an escalator or elevator.. park farther away from a store's entrance. again, the steps "movement" add up.. Next, add ONE more piece of fiber to your daily diet... the fiber of course will help you become more full and hence, perhaps not eat quite as much. Lastly, make sure you are drinking enough water.. water I consider to be the body's fuel.. and IF you aren't getting enough of it, your body can't be at its peak performance..
start out slow with what you can do right now.. it needn't be drastic, just decide you will do something..As you add in more of the good stuff, I think you will find that slowly, you want less of the bad.. good habits like bad, build on themselves.. try and make this a life change and not over-night change..... it needs to be done gradually ...
best of luck