How to partition my Hard Disk to facilitate installation?

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http://askubuntu.com – I am new to Linux family and willing to install ubuntu 11.10 x86 (32 bit) alongside Windows 7, i.e., Dual-Boot. I have searched a lot about how to make partitions of my hard disk for installing ubuntu but everyone follows a different rule or scheme which is making me a bit confused. So i am seeking help on how to install ubuntu alongside Windows 7. This is my Laptop's Configuration: Lenovo Thinkpad - B560 Processor - i3 (570M) HDD - 500 gb RAM - 4 gb Intel 1 gb graphics and my partitions at this point is like: Volume: File System: Status: Capacity: Free Space: (C:) (HowTos)