This is what it all comes down to really.
I dont become lucid often, my most recent was a few weeks ago, though it was only short, so the next night I was like 'Ok tonight i WILL lucid dream again! i must! i will!', and of course i didnt, got frustrated the next morning because of my failure and kept trying harder and harder. Only recently i came to the idea that I was probally being counter productive, looking back at the day of my lucid i was in such a calm mode of thought, I remember just 'knowing' that i would become lucid, but the days that followed after i had stressed myself out 'wanting' to become lucid again.
Thanks for the post, it reaffirms what i've been wondering lately, from now on all I shall just focus on remembering my dreams and my lucid goals, whilst just 'knowing' that i will become lucid when the time is right.