For instance, if I needed a new strong password, I could use, "This#jar#once#held#1111#M&Ms,#but#now#it#is#empty."

The only thing I need to remember there is the story of the jar and the padding character I used in place of spaces. If I really had to, I could put "#" on a sticky note under the jar. But of course, I can't use that password now. So I might instead use "I(used(this(jar(as(an(example(on(HN." But now I can't use that one, either. So maybe I use "These!blinds!are!very!dusty.!!Someone!should!clean!them." or "My^dog^once^killed^a^dozen^baby^rabbits^in^the^tall^grass^I^didn't^want^to^mow." or "MyFgreatFauntsFhadFreallyFlongFhair."

I get really irritated when sites tell me I have to include numbers, uppercase, lowercase, and symbols in the same password. I get especially irritated when they put an upper limit on the number of characters, or ban certain characters from appearing in the password.