[Suicide Junkie]

The other way to approach it is to increase the research point cost of everything. Then, when/if your games Last longer than normal you'll still be plugging away at tech.

(I assume you are already using Research Cost set to High...)

Extending the shorter tech threads out to Level X instead of III or V would do wonders as well. At medium & high costs, the incremental cost of techs increases exponentially.