I forgot to add this in my last post, because I forgot it existed. That is how horrible it is: I can actually succeed at putting it out of my memory. At least, that's what I'm going to pretend.
peek (v): to glance, to look at briefly. "She took a sneak peek at the new merchandaise."
peak (n): the extreme, maximum, vertex, acme. "She was at the peak of her career."
As you can see, "peek" is a verb, whereas "peak" is a noun. The latter is not so unique that it can be, um, verbified, like, "Hey, let me Google that."
So therefore, this is completely unacceptable: "Let's start off this blog post/tutorial/news article by taking a peak at what's actually going on here."
Argh! I see it so often, too. I am terrified that one day, it will be standard to use "peak" instead of "peek". I hate it so much, it makes me want to stab my eyes out.