I kept running into this: I wanted to type contractions like "he'll" or "we'll," but they were a hassle: without the apostrophe, they're both words on their own, so the keyboard software wouldn't recommend the contraction. I'd have to click the punctuation button, then hit the apostrophe to form the right word.
But nope, there's a better way: simply add a third "l." Type "helll," and the keyboard software will recommend "he'll." Type "welll," and the keyboard software will recommend "we'll."
[Update:] This also works with "were" and "we're." Type an extra "e" ("weree") and the software recommends "we're."