@peter jeffrey cobb,
You might as well contemplate your navel.
http://en.wikipedia.org/wiki/Premeditated_murder
http://legal-dictionary.thefreedictionary.com/premeditation
http://www.merriam-webster.com/dictionary/premeditation
Buying a gun to protect yourself is not an act of premeditation unless you are specifically planning to provoke an attack so you can kill the attacker.