With respect to neuroscience, what is the most efficient way to revise information and consolidate it into long-term memories? I mean in terms of repetition, multi-media, the timing between re-learning the same information etc.

The most effective ways to get information to "long-term memory" -- if there is such a thing, preferably levels of processing --- is:

organizing the data, periodic review instead of 'cramming,' make it meaningful, make new connections to information already known.

These are the most effective factors into consolidation.
Rehearsal is useless in simple repetition... if you make it elaborate rehearsal (meaningful, relating information) then this strengthens Hebbian synapses... therefore you have more "access routes" into the information. "...neurons that fire together wire together."

Too bad this was posted in October.

simple repetition doesn't work. What works for me is "active" retrieval, often through mental visualization. If you can visualize information in your mind, then you can easily modify, revise and manipulate the visual symbols; plus it will get consolidated better. As long as you can actively retrieve the info and visualize it, there is no need for rehearsal or practice. However, this type of visualization method may be improved with practice, making subsequent consolidation of information easier. This technique may only work for "visual" thinkers though.