Regarding 301; If I redirect nonwww to www domain with 301 redirect, do I still have to determinate inside google webmaster tools which version (www or nonwww) is prefered? Or is setting up redirect enough so therefore I don't need to determinate that inside GWT?

Regarding keyword being in bold: Usually keywords are supposted to be in bold font and it is irrelevant if they are links or not. But in heading (h1, h2); does there keyword also need to be in bold or is it enough if I care to put it to the beginning of heading? So elsehow asked; Does the keyword in heading need to be in bold font also?