1.Well, the only method I can think of is a auto suggestionish type technique, with some VILD. Think alot about your dream, while thinking "I WILL go back to this dream!"

2. I'd like to revisit: One was this weird dream, my first good dream. I got chased by a bus and it switched from 3-D to 2-D alot, and when I ran away into a garden, I hid behind a pot and a comic of everything that had happened in the dream. I just wanna go there to find out why this stuff was happening..

3. Well, I don't think it would, I mean, I have never had two dreams the same. But anyways, if you become lucid, there's more of a chance, I mean if you're good at LDing you could use Dream Control to your advantage, you could make sure that nothing changes the dream.