How to make Minecraft run faster? - 2

I use a Thinkware laptop and it lags like no other, it's unbearable, way too much lag to even move carefully so I can't even play on Peaceful! Is there any way I can make my computer run Minecraft better? I mean, it runs games like Civilization IV and Oblivion with practically no lag, so I have no idea what's going on. Please help!

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