I just got motivated again since I had a spontaneous lucid dream last night - and that’s great, although there is something that has been slightly annoying me for some time.
This last night I just randomly turned lucid, because I thought the neighbourhood around my house looked very different - then I told myself “hey isn’t this a dream? Yes, it must be!”.
Then I got this feeling that’s been troubling me in most of my lucids - a feeling of falling asleep and struggling to keep my eyelids open, and I could feel that I was slowly waking up and then I found myself in bed.
This has happened in about 80% of my lucids so far - I don’t really feel “excited” or anything in the beginning, because when I get lucid I spend a lot of time looking for absolute signs that I really am lucid, since I never really dare to trust myself on that.
Well i am no expert but i will tell you what worked for me. When i realize i am dreaming i normally do something that requiers me to see/feel my body. Like taking my clothes off or try to see my hands and feet. This helps you get more awareness and boosts lucidness. Also i have read that when you feel like blacking out or losing lucidity you can spin around your own axis and that has the potential to keep regain you the lucidity.
Much love;
Andres
PerfectSense
It may sound contradicting to what most others say but what works for me is when I feel the dream slipping away, I don’t start rubbing or grabbing things, but I close my eyes and stay completely still (like when doing DEILD) and think as little as possible (visualizing a desired dream location also works). Most of the times I end up in another dream. Some time I wake up or have a FA (impossible to distinguish which is which when you keep your eyes closed and lay still) and then I perform a DEILD 
basically just lay still till something happens).
The only downside is that it can be annoying if you liked the dream that you’re blacking out from and the next dream isn’t as good. On the other hand, I also use this technique to deliberately leave an annoying dream and enter a better one.