_ Mary had a little lamb , its fleece was white as snow +
This is an easy method to create complex passwords... It can be made even stronger by continuing the nursery rhyme and replacing the periods (full stops) with symbols.
You can use nursery rhymes, song lyrics favourite phrases or part of speeches... anything you want really.
Using this method allows you to keep the password anywhere you please, I use my cell phone and if anyone looked through my contacts list or saved messages alot of it would be cryptic to them. If I had used the above example in my phone I would simply have a saved draft message that says white wool window _,+
I never need my cell phone for reference to remember the password, but it is comforting to know if I do forget any I can easily retrieve them.