I don't think I gave a very organized answer to the question on tips for losing weight.

Well,this is what I did in year 3 to lose 15 kilos in a matter of months. Plus also a few tips added in.

1. I ate less rice and more veggies(I eat alot, so might as well eat more greens to fill up that empty space in my tummy).
2. I also ate brown rice ( which you do)
3. My mum was trying to lose weight at that time too, which helped as she did all the cooking. Like all housewives do. So basically she helped shape my eating habits and diet at that time.
4. I exercised daily. Ran 2.4, did push-ups and sit-ups to shape up. Sad to say, losing weight isn't exactly possible w/o having to break a single sweat.
5. Admitted that I was fat and needed to lose weight. (mindset)
6. Pray that your mum would understand your plight/predicament (i don't know how to put it :/) and try to explain it to her nicely that you would like to eat less. The key word here is pray.
7. Try out the beep test, or just run 2.4 daily :P Don't want to disappoint you, but...sweating it out is key in losing weight. Somehow it does.
8. Avoid eating the fatty part of meat. Chicken, pork and beef etc. Haha so no chicken skin.Once in a while maybe you can 'reward' yourself. But abstain from eating these fatty parts, coz' they're really fatty ><
9. Avoid consuming refined food products, such as white rice, white sugar, refined flour-based products (such as bread, eat only wholemeal bread if you want to eat bread. So white bread is a no-no).
10. Try to avoid bottled drinks like those sold in the canteen, they're usually loaded with sugar. Carbohydrates are just as bad (or potentially worse) as fat especially when you don't get to burn the carbs (i.e. exercise). But I think isotonic drinks should be fine.
11. Avoid drinking those sweet, carbonated drinks too. Once in a while should be fine ( really once in a while).
12. Avoid late night snacking, they really do count towards your calories.
13. No matter what, take breakfast. They do increase your metabolism.
14. Protein makes you feel fuller, but I forgot about the scientific basis for this. So eat more protein instead of carbs. If (and-only-if) possible, take at most a fist-sized amount of carbs for each meal. (but I don't really do that). For some reason vegetables also do have carbs. Their starch content perhaps?
15. Try to do push-ups and sit-ups/crunches. Or any of your own exercises, just to tone up.

These are the best tips I can come up with currently, but I'm not a professional nutritionist or some sort, if you don't feel right about this, don't follow it. I don't want to jeopardize your health.