I know this is a course to learn Polish but on a slight tangent. I believe many English speakers would say 'Do you think OF the past' when discussing times gone by. Would this make the sentence take a different form in Polish?
-myśleć o - to think of the past, think of people, actions, probably the most general, mostly used
-myśleć nad = rozważać (coś) - consider
-myśleć z (żalem, optymizmem, wyprzedzeniem) - to think with regret, optimism; in advance
-myśleć na (własną rękę, boisku) - to think in some particular way, or in place (boisku - playing field)
and probably few others. You can check the collocations of myśleć here: http://www.nkjp.uni.lodz.pl/collocations.jsp