You can learn a lot about their tactics from this observation, which will also assist you in choosing which cards to keep. Keeping cards that could impede an opsatta king savera saveraponent's progress might be a good idea if you observe them routinely selecting cards from the discard pile that could finish a set or sequence. You can create a hand that not only advances your goals but also thwarts those of your opponents by choosing your cards proactively & paying attention to what they are doing.