Anyone have recommendations for reading/viewing material and/or projects that you would recommend for getting started modeling?

I've done a few small models using things like 123Design and TinkerCad, but nothing worth writing home about. I'd really like to spend some time on a few detailed, but graspable projects that will help me wrap my head around modeling.

I see so many awesome things on these forums and Thingiverse, and just don't have a clue how to get started.

Any help is appreciated!