The Missing CS Degree

We all feel like we don't belong in this industry from time to time. The quickest way to get over these feelings is to dig in and learn the core concepts you might have learned with a CS Degree.
Data Structures and Algorithms
Data Structures and Algorithms

Many people are interviewing these days and you really, really should know the basics if you expect to do well. You'll find that here with common data structures and algorithms.