Is there a reliable way to learn guitar on my own at home?

Every time I pick up the guitar for a little bit, but then put it back up for ages. Thing about it is, it's the only instrument I have in my house right now (aside from a piano that's way out of tune). Frankly, I can't afford a guitar teacher, already paying for singing lessons. So any basic guitar tutorials that will help me work my way towards getting decent on it? I've had the thing for years but never really stuck to it.