It takes time to acclimatize - realistically, there are no shortcuts. High altitude mountaineers do by the mantra - "carry high, sleep low." When shuttling loads on a long approach, you take a load to your hgh point for the day, descend and sleep, climbing up the next day -repeating until you reach your objective.

Do be aware that HAPE and HACE (high altitude pulmonary/cerebral edema) can be fatal. Know the symptoms and descend immediately.