Conjugate and know the meanings of:
dar
estar
salir
venir
oir
traer
ver
tener
decir
poner
saber
conocer
hacer
These sites can give help you to practice.
Choose verbs from the bottom of the list:
http://conjuguemos.com/activity.php?language=spanish&id=5&source=public&type=verbs
stem changing
http://conjuguemos.com/activity.php?language=spanish&id=2&source=public&type=verbs
Also these sites have games that are a good, fun review.
http://www.quia.com/jg/1972085.html
http://www.quia.com/cz/437226.html
http://www.quia.com/pop/427239.html
http://www.quia.com/jq/224867.html
http://www.quia.com/cm/436556.html
http://www.quia.com/cm/115761.html