Parallette training is almost a lost modality in the world of fitness. CrossFit founder, Greg Glassman, begin to make it popular at the beginning of the century, but sadly even CrossFit gyms are beginning to stop their use.
If you want to be a serious athlete, you need to train on these. I made my first set by following this simple to follow guide written by Glassman. In total, it took me 1-hour to complete.
As far as a guide to use while training on the parallettes, seek to develop the skills found in this guide.