Guess the trend

[fourwings]

i continually receive newsletters from zach reg domains - he say we have to guess the trend of buyers , generally i use free appraissal "estibot.com" to register whichever domain i like,i will check all the parameters including overture / word tracker / ppc / frequency on google / msn / high relativeness of the images about the keyword domain on S.E - is it a best way to choose a domain ! please guide me