You can view phrasal verbs in a few ways:

  - Phrasal verbs are a difficult aspect of English.

  - Phrasal verbs are a beautiful aspect of the development of English.

Regardless of the view you hold, you might find this video about some common phrasal verbs containing the verb 'pick' useful: http://goo.gl/qGf772

Can you think of any other 'pick' phrases?  Do you have any questions about the examples in the video?  I am happy to help. :)