QUOTE
Glycemic Indeces
The glycemic index is a ranking of carbohydrates based on their immediate effect on blood glucose (blood sugar) levels. It compares foods gram for gram of carbohydrate. Carbohydrates that breakdown quickly during digestion have the highest glycemic indexes. The blood glucose response is fast and high. Carbohydrates that break down slowly, releasing glucose gradually into the blood stream, have low glycemic indexes.
You can't give up carbs completely since they are needed for cell growth and proliferation (replication), but you can give up the 'bad' carbs (one's with a high glycemic index). The Glycemic Index is a great way of telling which 'high quality' carbs you should be eating.
Weight loss generally revolves around (i)what you eat, (ii)when you eat it, and (iii)how you burn the associated calories (or kilojoules) off.
(i) The glycemic index is very helpful in describing what you should be eating. You've already found this to be helpful, Toasted... It's a good thing that you cut down on sugar for example, since it is a 'low quality' (high GI) carb...
(ii) Many small meals is far more beneficial to your weight loss than eating fewer large meals in a day. You need to keep your blood sugar (glucose) levels as constant as possible throughout the day. You start off with a low glucose level in the morning (since you can't eat while you're sleeping), so breakfast is very important to kick those levels up. Breakfast should consist of a low GI carb to ensure that you get a slow 'release' or turnover of glucose, otherwise you'll have an insulin spike at about mid-morning and you'll feel drained. The same applies to dinner. Since you're not going to be eating for the 6-10 hours while you're sleeping, you need low GI carbs before you sleep to ensure that the glucose level in your blood doesn't drop quickly at night.
(iii) You need to get yourself a heart-rate monitor. This enables you to train in the specific heart-rate zones that will maximise your weight loss. There is a general misconception that you need to work hard to lose weight... you don't. Training at 60-75% of your maximum heart rate maximizes fat metabolism, while allowing muscles to reating glycogen (stored 'quick-release' glucose). You don't really need to hit the weights for a while unless you want to get some definition. Cycling and the rowing machine are the best for the low intensity weight loss training.
I coach a girls' rowing squad... and I'm using a system where they can lose weight while still getting stronger in the gym. Their situation is a little diferent to yours tho, since they are aimed at performance by increasing their power to weight ratio rather than just weight loss and fat metabolism.
For about two months now I've had them doing some heavy, heavy gym (4 sets of 8 reps of 170kg on the leg press for example)... and I told them to expect to get bigger and heavier (hypertrophy)... they have. The average weight of the crew is about 65kg. Now we're doing long 45-60min pieces on the water at heart rates of 140-160 beats/min (70-80% of Max HR). The average crew weight has dropped 3kg in 3 weeks. They are still as strong in the gym, but have less weight to haul with them in a race... it's the perfect situation for them.
You can cut out the hypertrophy (gym) part, and train for 45min, 3 times a week at a low intensity and see results in 2 weeks. You don't need gym if all you want to do is lose weight and get a bit of definition... you'll become more cut just by doing the cardio-work.