For those who do not normally practice, such visualization would be kind of hard to do. So quickly take up your practice now, starting with the preliminary practices, then the generation stage and yidam practices afterwards. To follow this sequence is very important. Of the five inner preliminary practices, the Vajrasattva and Guru Yoga practices are of the generation stage practice. If the bardo being was proficient in practice when alive, there is a chance that liberation can be attained directly through pure awareness or yidam in the intermediate state, thus taking no rebirth. Even failing this, one can still use this method to choose one’s direction and innate gifts in the next life. However, if this still fails to work and the image of a man and a woman in sexual union continues to appear, and desire and anger cannot be kept under control, the third option should be employed.

~Depicted from THE HANDBOOK FOR LIFE'S JOURNEY - On Death And Rebirth-How to Take Rebirth