All the advices above are very good. Mainly this third eye meditation.
But, as it takes some time to master the technique, i would suggest taking a 3-4 days break. It would be enough to allow you have a FAR higher high. And try to smoke the largest amount of weed in the smallest amount of time, with a gravity bong, for example. Or use something stronger, as Hash oil. If your weed/hash were good, there is a good chance you will hallucinate mildly.