I certainly don't favor 95 year copyright terms of the Disney variety, or even life + 70 for authors - more like 35-50 for collective/corporate works and life terms for authors, or maybe some combination of the two, although that would be tricky to administrate.

I also think that there should be a few different levels of licensing (much like the Creative Commons approach) and possibly some sort of price controls for licensing, to be reflective of the fixed pricing for copyright registration that currently obtains. In general I'm against price controls, though, and going down that route could lead to mandatory licensing which would also be undesirable (eg you find your passionate song about freedom used in a political campaign commercial by a candidate whose values you find repellent, and can do nothing about it because anybody has the right to unilaterally license anything).

Other people have proposed increasing copyright renewal fees over time, or renewal fees that were somehow keyed to the economic performance of a copyrighted work, though I think both these approaches are problematic.