Extension Recommendation

I am newbie in Sketchup. Want to use it mainly for REVIT family creation. I believe I have learnt the basics, now want to use the SketchUp extensions for faster work flow but with all these extensions floating around, I feel like I need hours just to figure out which ones are worth it. So, I was hoping you could help:

  1. What extensions do you use all the time, and why are they your faves?
  2. For someone like me focusing on interiors, what kind of extensions should I check out?

There was such a topic but I cannot find it now.