I like the barricade feat, but I think we can do better!
GOOD FENCES AND NEIGHBORS (COMBAT)
Prerequisites: Barricade, Engineering 3 ranks.
Benefit: When you build a barricade using the barricade feat, your wall is on all sides of you, granting partial cover on all attacks. Any enemy moving into your spaces must treat the spaces as difficult terrain, while you have no penalties to entering or exerting that space.