Modal verbs
Will and
  would for habitual behavior
Will
 Will can be used to talk about people's habitual
  actions or their characteristic behavior.
  -  He will spend hours at a time on the Internet.
 (= He habitually spends hours at a time on the Internet.)
- They will spend hours on the beach every summer.
    
- Tom won't get home before sunrise on the weekends.
    
Will can be used in the contracted form.
  -  He'll talk to himself for hours. 
Will can be stressed (emphasized) in a
  sentence. This expresses criticism of a habitual action or characteristic.
  -  She will arrive late for dinner parties.
  
- He will wear those awful sweaters. 
Would
 Would is used to talk about people's habitual
  actions or their characteristic behavior in the past.
  -  My mother would get really quiet when she was
    angry. 
-  We'd stay up late talking about politics,
    but we wouldn't actually do anything. 
 Other ways of talking about habitual behavior
 Be in the habit of + -ing
  and the adverbs habitually, always,
  usually and regularly
  can also be used to talk about habitual actions and characteristics.
  -  On my day off I am in the habit of spending
    all morning in bed. 
- She habitually watches six hours of TV a day.
  
- On a good day I usually get to work at nine.
- Some dogs regularly bark for no reason.