Is it possible to have enough control over your mind to induce a lucid dream on command... not necessarily 100% accuracy but I mean at odd times generally. You feel that you would like to LD and do not have any prerequisites for induction; for example, sleeping for 4-6 hours beforehand, having a regular sleep schedule, or being specifically really tired before attempting.

Can anyone do this? What is your process for resting your mind and body? How long did it take to achieve this control?