I found my current position via LinkedIn. I also searched with StackOverflow Careers, the HN monthly hiring threads (which weren't useful due to a lack of posts for my area), and the job pages of local companies. I probably would have used more sources if it had taken any significant amount of time to find a job.
My previous position was via a university career fair when I was still a student.
My previous position was via a university career fair when I was still a student.