Learn Portuguese: Oops, there's no accent there!

Even after a decade since I picked up my first Brazilian Portuguese grammar book, I still wonder about the placement of an accent here or there. Online, there’s tons of blogs and sites in Portuguese that talk about the spelling reform from a few years back, and all the rules that accompanied it. A lot of that information concerns (mostly) accute accents and whether the word is paroxytone or proparoxytone, etc (linguistic terms regarding syllable stress).