I get really confused with this, because I want to write Ela sente bem. When do I know when to use se?
For reflexive verbs:
http://www.learningportuguese.co.uk/language/verbs-reflexive.html
http://www.netplaces.com/brazilian-portuguese/more-verbs/reflexive-and-reciprocal-verbs.htm
http://quizlet.com/5341603/brazilian-portuguese-vocabulary-reflexive-verbs-verbos-reflexivos-by-street-smart-brazil-flash-cards/
I think "she feels good" would be a better translation.