Problems with dream control and stabilizations

Last night I had a lucid dream - twice.
Sounds great, huh?
Well yes, it's certainly wonderful - however, the problem is that I seem to have lots of problems staying in them and stabilizing them.
I had my first intentional lucid dream a little more than two years ago, in late October 2011, and for some reason most of my lucid dreams start out as False Awakenings;
and this last night I had two lucid dreams like that.
In the first dream I tried looking at my hand, without really expecting it to be a dream, but to my delight my hand looked very weird and I became lucid.
So I went out of bed, with an effort (for some reason I always have problems moving and walking in my "False Awakening lucids"), and went out of my campus apartment, and looked to the left, at the main entrance at the end of a long, narrow hallway, in which I was now standing.
I kept telling myself that I was dreaming, eventually lost focus, and began to feel my physical body, and then I woke up.
Then a while later I fell asleep again, and had another False Awakening.
I entered the hallway again, and it was fairly dark, and this time I tried rubbing my hands, and I kept rubbing them for about 10 seconds, but nothing happened.
So I went outside, and it was nighttime, and now I actually remembered that Tim Post had said in his "Advanced Lucid Dreaming Part 10" video that darkness was a personal sign for him that that the dream was coming to an end - so I tried looking up towards the sky, maybe in an attempt to make it brighter, and I saw the moon and an incredibly beautiful star, almost as if it were from an animated movie.
Then I lost focus again and woke up.

Basically, I seem to have big problems staying in my lucid dreams and even more problems affecting them in any way.
The dream pretty much stays the way it is given to me in the beginning, no matter what I do, and it feels pretty much like walking around in waking life, with the same physical limitations - and this is starting to annoy me a bit.
I am of course really happy for any lucid dreams I get, but it would be great if I could actually alter them or make them more vivid.

I remember one dream where I suddenly got crystal clear sight, and started summoning all kinds of things, but I'm wondering what I did in that dream that was so effective.
All I remember is that I was trying to see where I was, and then suddenly I just magically got excellent sight there and could affect the dream in many ways.
I want to succeed with that again.