In addition to writing what you've learned from all the tasks you've done professionally for a good reason -- and since that reason is good, people who hire wil

In addition to writing what you've learned from all the tasks you've done professionally for a good reason -- and since that reason is good, people who hire will care about your ability to do it -- you can also write (in a positive and professional way) about things you've done for no reason. Five years ago I had a boss with a, shall we say, keen eye for backwards compatibility. One of the strange rabbit holes we went down was building a jquery widget to implement the input[placeholder] attribute for browsers that did not support it. This turns out to be bizarrely complex if you want e.g. the cursor to focus before the placeholder text. And that _could_ be seen as a waste of time, but it would be perfect for a blog post talking about how to build something we all are familiar with (and likely transitioning into a discussion of the Shadow DOM) that establishes a reasonable amount of credibility. [Edit: that's not even the most interesting one from that job, either -- while I didn't work directly on it, a clever coworker figured out how to write a client side collage builder that supported both download AND IE6, which is bordering on genius. I've heard him explain how he did it, and it would have to be a series of blog posts, there's just so much there -- obviously the median boss would have let him just use imagemagick on the server.]