Always try Option 1: Plug it in, unless it is an infinite limit. You would be surprised how many times the most complex looking equation has a very easy to solve limit. Never forget to always try Option 1: Plug it in.
Option 1: Plug it in should always be the first option you try, and it will usually be the last option you want to try on any of the other following options. It should always come back to trying Option 1: Plug it in.