Welcome to the class, VividDreams! Good to have you here.

By "resume dreams" are you looking to resume dreams from previous nights, linking them together in a longer story arc? Or are you thinking something more along the lines of dream chaining (aka DEILD) where you wake up from a dream and try to immediately slip back into it? Either way, a very worthy skill to work on.

Sounds like you've hit some LDs before, which is good. How long ago were these? Did you use any particular technique to achieve them or were they more spontaneous?