how many sockets have you got in your home?

I)If more than one>
Purchase an adsl filter from radioshack or any electronic shop. connect your modem to it ..and voila

II)If you have got 1 telephone socket only>

i) larger tel extension to move the modem to another room
ii)larger cat5 ethernet cable. leaving the modem at the same location.
iii) get yourself a belkin(wireless/non-wireless) "home adapter" or "powerline adapter" like Powerline Turbo Starter Kit F5D4073 . Your internet signals will ride in encrypted format over you electricity lines and will be decrypted via the 2nd adapter(they come in pairs) on the other end where you plug in a ethernet cable to your computer.