Well, for IMPACT! - usually in Florida it's on FSN Friday's at 3pm.
They sometimes air a replay on Monday afternoon too, I think at 3pm as well. There is also NWA-TNA XPlosion on Sunshine Network at 10pm. Depending on Sunshine's deals though, the show could start at 10:30 or 11 sometimes (due to sports schedules and such).
Hope that that helps somewhat