Considering that most adventuring parties will deal with light, and there are a few good templates and races for stealthy types that include Light Blindness (or at least Light Sensitivity) what is out there to counteract this in someone who suffers from it? I know of a few items that offer bonuses to saves against harmful light effects, but would these protect against Light Blindness/Sensitivity as well? And what would be the best (price and effect wise) options to protect against Light Blindness? And the best for Light Sensitivity?
Minimizing Light Sensitivity & Light Blindness
Alternately: Minimize the symptoms
Much longer than this is the list of items and spells that prevent or mitigate blindness or dazzling in general: the Raptor's Mask (MIC), Goggles of the Golden Sun (MIC 205), or the spell Vision of the Omniscient Eye (DM 74). You'd still be Light Blind or Light Sensitive going down this route, but its effects would be minimized or negated.
MIC 75 Blindfold of true darkness | Blindsight out to 30 ft., immune to sight-based effects | 9,000gp it makes you blind past 30ft which can be a problem out of combat but it does make you imune to gaze attacks too.
Tremorsense Items/Feats are useful for overcoming light blindness too.