Bricking

i dont have a modchip....:
someone told me you can only brick your wii if you have a modchip.... is this true.... if not then how do you brick a wii

No that's not true, there's plenty of ways to brick a Wii; for example: [forum.wiibrew.org]

Ok this may sound stupid but how do you brick your wii

Please list all ways !

He linked to a list. Learn to read and stop expecting to have your hand held through every single step of running homebrew on your Wii. You really need to read yourself and learn yourself, that is how you prevent bricks. Getting "just enough" information from people on forums is not good enough and eventually you'll probably brick your Wii. Read a LOT and learn.