• used to + infinitive refers to actions and situations in the past which no longer happen or are no longer true.
• be used to + noun/pronoun/gerund means 'be accustomed to' or 'be familiar with'.
• get/become used to + noun/pronoun/gerund means 'become accustomed to' or 'become familiar with'.

http://learnenglish.britishcouncil.org/en/quick-grammar/used-infinitive-and-beget-used http://dictionary.cambridge.org/grammar/british-grammar/past/used-to