How can I increase my signal on my wireless internet router & wireless card?

I've just moved out of my mums house, however while I was there I bought a D-Link Wireless router & hub for our broadband. The house ive bought is actually around the corner from my mums, weve actually managed to get our BT cordless phones to work from my mums house to my new house and after discovering this... show more I've just moved out of my mums house, however while I was there I bought a D-Link Wireless router & hub for our broadband.
The house ive bought is actually around the corner from my mums, weve actually managed to get our BT cordless phones to work from my mums house to my new house and after discovering this I'm looking to get the internet work from my new house so I can have free internet. :-D I can just about pick up some wireless networks from my new house that I could pick up at my mums house but the signals weak.

Any ideas how to increase the signal or get this to connect would be very much appreciated.
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