Yesterday I started my experiment with caffeine pills. My goal is to increase the vividness of my dreams and hopefully get lucid.
I have been drinking coffee during my WBTB and it gives me very long and vivid dreams, only problem is; getting back to sleep :-(
With the pills I don't have that problem because the caffeine starts to kick in when I'm already asleep!

The pills are 100 mg caffeine per capsule, that's about the amount of a normal cup of coffee. Yesterday I took one after 6,5 hours of sleep and a menthol as well (have been reading the "Menthol as a dreamenhancher" thread) wrote down my dream and got back to sleep.

Result: not a long dream but a very vivid moment in the dream, almost lucid-like.

I will post my results here and comments or questions are welcome.