If you are seeking to sharpen your professional skills by gaining job-seeking tips or taking a online courses, you should bookmark http://www.careerbuilder.com/.
This website provides asynchronous training covering a broad range of technical and interpersonal skills. And some of the training is free. I took a session of a training course myself and found the content relevant, the depth appropriate, and the methodology effective. Also available are how-to articles intended to strengthen the skills of job applicants.