According to Osho, the Guru's form is a loving doorway, a focal point for devotion that kindles the heart; when love awakens through prayer, worship and adoration, meditation follows like a shadow. Use the form as the right medicine for your bent, but don't cling or worry about techniques; accomplish love, and all else, including meditation, is accomplished.
Lovingly remembering the Guru helps your heart open, and then meditation happens on its own.