trading world? at what level?
trading in the pits? trading at a small firm? a large firm? trading on your own?
and scalping / daytrading? or buying a large position over time, and holding for multi years?
and stocks, commodities, derivatives, swaps, etc.?
those are all different trading 'worlds', and although some of the basic how-to's are similar (though multi year for a firm and small position for an individual are *completely* different), it depends on what you are looking for.