Method 3-1: The Google Copy-Paste Method
Step 1: Open up Google and type "what is the solution to life, the universe, and everything?" in the search bar. Press enter.
Step 2: Scour the results pages for any mention of "42" and copy it down.
Step 3: Repeat steps 1 and 2 until you've got it right. Or just give up and use a Magic 8 Ball.
Hyperlinks:
The Occam Razor Method: Because who needs answers?
The Random Button Method: For when you just want to press things