you could try and do reality checks whenever you even think about them, as many times as possible during the day (this got me a *short* LD within a day, and another the day after) you also have to THINK about what your doing, dont go through waking life as a zombie, make sure your surroundings check out as being correct. I also mixed this in with a few visualization techniques, they involved imagining a random situation and visualizing myself becoming aware that i was dreaming after doing a reality check, then imagining what i would do IF it was a dream.

hope this helps