Fair Investment, HOW?

Investment and speculation taken from Nikkentobi (Kaskus)
Do not get greedy, distinguish between Investment and speculation Sometimes it feels sad to see a lot of people who every time trapped "investment" (in quotes) is not correct, because they have not understood the true investment is like what. Investment, according to Benjamin Graham (Warren Buffet teacher), is
"An operation the which, upon thorough analysis, Promises safety of principal and an adequate return. Operations not meeting these requirements are speculative".