Yes, drinking water is very important for health and weight loss both.
Do you do any form of movement/exercise? Walking or anything like that? I have a set of 3 pound weights from the pharmacy/chemist up the street and "play" with them while I'm watching TV (I have flabby/weak arms) and I'm trying to work on using my stairs and going up and down often for exercise. Movement can help your digestion.
I'd maybe try to replace the take away some with fresh salads and maybe tinned fish or baked poultry?
http://www.mayoclinic.com/health/gal...165/DSECTION=9