caer (to fall)
yo caigo
traer (to bring)
yo traigo
caber (to fit)
yo quepo
hacer (to do, make)
yo hago
poner (to put, place)
yo pongo
saber (to know something)
yo sé
salir (to leave)
yo salgo
valer (to be worth)
yo valgo
ver (to see)
yo veo
important note: learning these is doubly important, since the verb forms of the present subjunctive mood are based upon the yo form of the present indicative!