I have a halfling who took the alternate racial feature Adaptable Luck (Advanced Race Guide), giving me a luck bonus to things +1 after a roll or +2 before.
I took the trait Fate's Favored (Ultimate Campaign), increasing by the bonus by one.
I took the feat Fortunate One (Advanced Race Guide), as a pre-req to Adaptive Fortune (Advanced Race Guide), which increases it by +2.
So this would give me +4 after or +5 before the roll.
Are there any other feats, magic items, or spells to push the adaptable luck bonus even higher?