Stage 3 is emotions. Try purposefully creating emotions. Try listening to music, and enhancing the emotions you feel from the music one at a time, and slowly. Try changing your emotions the same way you breathe into different parts of your body. Try creating an emotion when you breathe in, and letting it dissipate when you breathe out.

CFAR actually has a class on this–well, not as specific as creating an emotion when you breathe in and letting it dissipate when you breathe out, but on purposely creating emotions in general. This is something I've been doing for years, because emotions are interesting to explore.

Be careful of image meditation. If you choose to go beyond halfway through the path of meditation, you will have to remove all of the images you accidentally lock into your body.

I'm not at all sure that my current goals involve going "more than halfway" along a path that's described in such abstract terms that I have no idea how it actually maps onto my real-life experiences. I'm happy to, y'know, keep meditating and reap whatever benefits may come.