It's important. Whether it's for controlling the runes, countering junglers, or avoiding ganks, proper ward usage and placement wins games.
Planning on getting boots right away? With few exceptions, you need this guide.
Auto-attack is for noobs, read this if you don't know what your 'H' key is for.
Just starting HoN? Never played DotA? Here's a guide that I wished I had back in beta.
More HoN info coming soon!