"To be used to doing something" or
"Used to do something"
Definitions:
Be used to + ing-form
means that something is familiar and is no longer
strange. "I'm used to travelling " means that travelling is no
longer strange or difficult because I have done it for so long.
Used +
to-infinitive means that something happened
regularly in the past. "I used to travel" means that in the past I
regularly travelled, but no longer do so now.