mit Rat und Tat
With counsel and deed. Duden explains it as with advice and practical help. Jemandem mit Rat und Tat zur Seite stehen. To stand by someone with advice and help.
jemanden zu Rate ziehen
To draw someone into counsel. To ask someone for advice. Duden’s example is einen Fachmann zu Rate ziehen, to consult an expert.
mit sich zu Rate gehen
To go into counsel with oneself. To think a problem through carefully.
Da ist guter Rat teuer.
Good counsel is expensive here. Duden explains it as a very difficult situation.
sich keinen Rat mehr wissen
To know no more counsel. To see no way out of a difficult situation.