Dave has enlighten about the modules of drupal7 which are safe to use to keep your drupal 7 site future proof with drupal8.
His presentation will answer your questions like
- What field modules can I use that work the same as Drupal 8?
- What WYSIWYG editor should I use?
- How can I start preparing to migrate my existing Drupal site to Drupal 8?
- What kinds of modules can I use so I don't have to retrain my editors and administrators when we move to Drupal 8?
He has also covered some basic concepts for those of you writing Drupal 7 modules that you can do right now to better prepare yourself for writing modules in Drupal 8.