For me, I've been able to improvise reasons immediately and pretty much pride myself on that. If my characters aren't flexible (For instance - Loki won't set foot in Ul'dah unless she has to and only is in the Shroud because the NB are) then I try to be flexible as a player. "I want to RP in Ul'dah, bring Loki." Instead of "No she wouldn't go there." - which is true she wouldn't, I just go "Okay she had to pick up a delivery for the Free Company there and will end up running into you." or "Okay she just got out of a meeting there--" etc etc. This keeps the integrity of the character intact, but makes me more fluid as a player.
And that's how I get around it.
And that's how I get around it.