Sounds like making your own pack lunch will help
how about to start
a low fat/natural yoghurt
a banana, apple etc
some nuts or carrots to snack on
get some recipes for couscous, quinoa, chickpeas or pasta all with veg
1 or 2 litres of water in a bottle
avoid the bread and sweets and fizzy drinks
have friday as treat day, add in some meat and a bar of chocolate! and a pint down the pub!
Saturday you burn it off cycling right...
basically we can recommend this stuff all day long but the only person that can change you is YOU.

