The solution: break your task into smaller chunks (< 1 day). Then estimate for the week, max. "At the end of the week, X will be done.". After then, scope will be more clear for the tasks following...
PS: I've noticed that code gets estimated too low in general, but anything involving manual (repetitious) work gets estimated way too high.
PS: I've noticed that code gets estimated too low in general, but anything involving manual (repetitious) work gets estimated way too high.