How can I improve my first-principle calculations for better results?

[swift_tiger]

Hello, everyone. I am new in first-principle calculation.I want to communicate with everyone about how to make a good calculation in the floop of the calculation.

Thank you.

 

[NascentOxygen]

Hello swift_tiger. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif

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