How can I extend the range of my home wifi?

Our broadband router is in the living room, which is about 10 metres from the kitchenEvery week a Guardian Money reader submits a question, and it’s up to you to help him or her out – a selection of the best answers will appear in next Saturday’s paper.Our kitchen appears to be in an internet black hole. Our router is situated in the living room, which is about 10 metres from the kitchen. The wifi signal stops at the door of the kitchen, however. I have tried a few wifi extende