Make sure that your loss of appetitie does not lead you to eat too little. If your body thinks there is a famine, it will go into "starvation mode". This will cause a plateau - or slower weight loss.
If you are eating less, make sure the food you eat is full of nutrients. Fresh (preferably organic) foods are high in nutrients. Each meal should include healthy protein e.g. eggs, fish, lean meat, beans, lentils, chickpeas.
Make sure you take a daily Multi-vitamin and Multi-mineral supplement.
Take fish-oil and flax-oil (in liquid or capsules) each day. Besides the health benefits, they will help ensure that your skin does not become dry and wrinkled as you lose weight.
Drink plenty of water to help your body dispose of excess body fat. Also to prevent dehydration (and skin wrinkling).