I follow, in most cases, the following guidelines for authorship: PhD students are first authors, followed by postdocs and research scientists. I am usually last, unless some of our industrial collaborators are co-authors. 

For reasons that are too long to explain in detail here (check my online statement), I tend to focus on high-quality journals rather than conferences, though I occasionally publish in the latter as well. Students tend to get more informative feedback from such journals, the submitted papers significantly improve thanks to this feedback, and the process is much less arbitrary, which is particularly important for students and junior researchers. Further there is more space to get into details and provide a more complete account of the research being reported. 

Please check my DBLP entry for a fairly complete list of my published papers. Many of them are available on ArXiv.