Here is a recipe for hot and sour soup that I like. Tweak it for your preference in flavors.

4 cups chicken stock
Heat. Wait until boiling.

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1/2 teaspoon white sugar
1 teaspoon salt
1/2 teaspoon ground white pepper
Add that to the boiling broth.

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2 teaspoon soy sauce
2 tablespoons red wine vinegar
1 teaspoon sesame oil
1 teaspoon chili oil (optional)
Add that to the boiling broth.

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4 tablespoons water
2 tablespoons cornstarch
Mix together in a cup, and get it milky.. not thick at all. pour slowly into boiling mix. Soup should very quickly become thick.

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Firm tofu, cubed
Add to soup. Wait 1-2 mintes.

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1 egg, lightly beaten
Take off heat, pour slowly into soup while stirring. Egg beaters work, but don't give you long strands of egg.

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You can put bamboo shoots, mushrooms, and other stuff in there, but I don't like them.