An opponent may be nearing the completion of a meld with those particular cards if, for example, they routinely draw cards from the discard pile rather than the stockpile. Understanding this enables you to mtiger 3 telegramodify your own approach appropriately, possibly by keeping some cards that could finish their meld or by throwing away less valuable options. Also, psychological understanding of your opponents' inclinations & routines is just as important for effective anticipation as observation. Depending on how comfortable they are with particular card combinations or strategies, some players may play in predictable ways.
