meditated

mused (upon), reflected (on or upon), reminisced

analyzed, explored, reviewed

concluded, reasoned

second-guessed, speculated (about)

brooded (about or over), dwelled (on or upon) (or dwelt (on or upon)), fixated (on or upon), fretted (about or over), obsessed (about or over)

believed, conceived, opined

absorbed, assimilated, digested, drank (in)

dreamed (or dreamt), hoped, wished

considered, debated, mulled (over), pondered

attempted, endeavored, strove (also strived), struggled, tried

plotted, schemed

accomplished, achieved, effected, executed, performed