I am a devotee of Lord Siva. Should I go to temples dedicated to Lord Vishnu or Devi also? And if I go, how shall I worship the Deities there?

Yes, you should never miss an opportunity of visiting and worshipping at any shrine you
come across. When you go to a temple of Lord Vishnu or Devi, worship Lord Siva Himself
there. Look upon the Deity in the temple as another form of Lord Siva. If your father came to
you in the attire of a High Court Judge, or being an actor in a drama, if he came to you in the
dress of a female, will you turn away from him? You will greet him as your own father in any
case. Similar should be your attitude in w… http://y-v.de/cwFFdh