C Code Optimization Technique

I found the following article very useful.
Some times I will write my understandings/ tips and techniques in my own words..
Till then the link..
http://www.codeproject.com/Articles/6154/Writing-Efficient-C-and-C-Code-Optimization

One More Link

http://www.tldp.org/LDP/LG/issue71/joshi.html

A very nice post on Endianness