Take a long, slow inhalation, in an attempt to vaporise the majority of the DMT
Exhale the vapour after holding it for as long a period as possible into a balloon or bag
Take a breath of fresh air
Take a second (or third if necessary) hit and do the same as with the first.
Take a breath of fresh air
Inhale the contents of the balloon/bag and hold in a similar fashion
Exhale back into balloon/bag, take a breath of fresh air, and repeat until liftoff.