Interesting. How do you know you are not going out of body?
Relaxation on weight and warmth coupled with concentration is good start for both OBE and LD

BUT:

a) If I want to lucidly dream I use imagination. I picture in my mind something simple first... crude image and make it more and more vivid and more complex. The picture will then become my wished surrounding, where I can do my explorations. Or I picture an circle and let it move on me, while there is second circle within, next within the second... and it creates illusion of movement... This can be simplier than picturing surrounding, but it has one downside, I don't know for sure where I will end.

b) While I do OBE I use feeling of separation... After relaxation is so profound that I feel I can't move my body I start to do rocking movement on my hand first... small ones, as to not move real muscles. I give impulses to move hand, very strong ones, but at the same time I do not make and don't want to make movements with real muscles. It is hard to describe... Even in my native language... Once I can make smol movements I start to feel two bodies. Physical one, heavy, very relaxed and spiritual one pervading that physical, but loosening from it on place of my hand. I make movements larger and larger. I feel that feeling as much as I can and concentrate on it. At last I make large movement and stand up from physical body. All the time I use no imagination. I let my concentration and feeling to do whole separation. I find myself in dark. I keep moving. My mind is blank. Feelings in balance. Neutral. Thoughts are changed for feelings. Active thoughts are detrimental for staying out of body. After a while I will start to see my surroundings. Everything is interesting and at the same time not interesting for me. Mind in balance. Imagination would change feeling of surrounding... and change it to lucid dream.

My focus is much more on OBE- astral travel and travel to higher dimensions... Only recently I found interest in LD. That is because of my study of possibility of reality of existence out of body. LD shows possibility to connect with people whose are dreaming. And communicate with them. And maybe to see and explore their dreams... to help them if they have problems with nightmares. Maybe even to pull them to astral dimension, out of fantasy of dream. My final objective in proving reality of OBE. Even if it would be only my proof. Other objectives are more difficult... I would like to learn to travel between dimensions... Astral is simple, but mental is difficult to do directly from body. And budhic... that is very interesting one. I was there only once... space... full of distant stars- souls of peoples. Everything surrounded by love.