The captains daily shipboard routine would appear to be quite a "leisurely" routine.
Apart from checking every department in the ship, from engineering to the kitchens, every morning, his life seems to have been one of total delegation.
The captain did not work on watches (shifts), like his officers and so he appears to have had a good nights sleep (or a good eight hours at any rate) on most days. The captain had total authority over the speed and the course of the ship, but the minutae was left to his subordinate officers. Woe betide any of them who deviated from his instructions.
However, although the duties of navigation could be delegated, the captain of any vessel (then and now) carried awesome responsibility.
Ultimately, the buck stopped with him. If anything went wrong with his ship, even due to an error on the part of one of his officers, it was his responsibility.
To use a contemporary similie, take the case of Commander Scott Waddell of the USS Greenville.
It is interesting to note that White Star Line rules for its commanders stated that if his ship was further than 60 miles from land, in conditions anything other than perfect, then the captain was required to be on the bridge for however long it took for the danger to clear.
Perhaps this explains Captain Smiths famous remark to Second Officer Lightoller before he turned in on the night of the disaster, asking to be called if things "become doubtful".
When it became apparant that the ship was mortally wounded the captain, true to his station, delegated the loading and lowering of the boats to his senior officers.
His apparant lack of action is seen by some to indicate he was overwhelmed by the magnitude of what was happening and that he had lost all sense of leadership through shock.
Quite the opposite is true. He carried out his final, absolute duty by going down with his ship and he remained its captain to the bitter end.
I hope this helps in some way.