What is the easiest technique for large builds?
I recommend getting 15-20 small-medium tupperware containers (you can get them pretty cheap now). Separate the pieces in a way that makes sense to you. Tupperware has flexible sizing and they are transparent, making it easier to identify pieces from the side of the container.

You don't have to completely put each individual piece in its own bin. But, for example, you could put 1x1's of all colors in one tiny bin, all transparent pieces in another, etc.

The important points on choosing your bin contents is:


Make it so you know exactly which bin to reach for when you need a
certain piece. The bin should have a clear theme in your mind.
Ensure that you don't put difficult to tell apart pieces in the same
bin; they should be easy to differentiate even when only seeing half
of a part.


The first rule and the second are often conflicting. One thing I recommend is to keep even-length and odd-length pieces separate. Don't put 3 and 4 longs (of the same color and type) in the same bucket, but 2 and 4 is fine.

Half an hour sorting the pieces at the start can save much more than half an hour in the build, as well as making the build more pleasant and fun.