Sometimes words aren't needed when someone you love is hurting.
Sometimes it's just your presence, your hugs...and even your willingness to emotionally eat crap with them as they are in their valleys (or at least offer it to them if you're not able to).
Sometimes the best support and advice is NO advice, but powerful silent prayers.
"Then they [Job's friends] sat on the ground with him for seven days and seven nights. No one said a word to him, because they saw how great his suffering was." -Job 2:13