A cheap, simple solution for secure tent-pitching on snow or sand. Note: The dowels work better for snow. However, by using a small disk (something like kid's play dishes), you can get the same effect for sand.
This low-bulk bracing is used by sports trainers and wilderness medics to stabilize weak ligaments and discourage further injury. You can apply all sorts of extras like pre-wrap liners, ankle pads, and skin adhesive, but here's the down and dirty trail version.