It's all a question of experimenting.
In your cupboard, you should be armed with a variety of dried herbs and spices along with white and red wine vinegar, honey, soy sauce, teriyaki sauce, golden syrup, worcester sauce, hoi sin sauce, curry pastes, creamed coconut, tin of coconut milk, olive oils, lemon and lime juice, tomatoe ketchup and probably a lot i've forgotten.
Keep things simple....today i did a gorgeous egg fried rice for lunch....
as much rice as is necessary
1/2 onion finely chopped
1/2 pepper finely chopped
sliced mushrooms
Garlic finely chopped (amount according to taste)
Ginger...finely shopped
2 eggs.
Soy sauce
Lime juice
Chilli (if required)
Boil rice and drain
Chop peppers, mushrooms and onions and fry off until golden in a wok.
Add rice, crack two eggs into rice, add garlic, chilli and ginger and stir vigorously on a high heat making sure the eggs are well stirred in.
Add a few squirts of soy sauce and stir-fry for a few minutes.
Of course you can add or take away anything you don't/do like. I often add slithers of pineapple too.