Honestly, try this: All powers which do only attribute modifier or constant damage add "1d0" to the damage rating; they are all "rolls." However, damage bonuses can apply to only one damage roll during an action (that is, Action); in general this will be the first one that hits, if you hit an edge case ask the DM before taking the power. Note that close and area attacks roll damage only once; the bonus applies to the roll and thus to the damage inflicted on every target of the power who gets hit. Most importantly, anytime damage occurs outside of the time-frame of an action you have taken (and whose action was a power use which inflicted that damage), it is not eligible for your static bonuses - this covers ongoing damage, conditional damage, start-of-turn or aura damage, and so forth.
Also, for the love of Pete, house-rule fix Reckless and Bloodclaw. Static bonuses aren't nearly so horrible if you rewrite these effects into what the designers pretty obviously meant for them to do - apply to their own attacks only, once only per penalty taken, and so forth.