Observations in TNG: "Tapestry"

This nice wide shot of sickbay gives a good idea of what this part of the set looked like in season 6. This is one of the few episodes in which the door next to the large sickbay monitor is seen open, the others being "The Bonding", "Night Terrors" (in which the door leads to the morgue), "The Game" and "Realm of Fear".

The three trolleys (each with three levels and three casters) are Boby taborets originally designed by Joe Colombo. They could be seen on Regula II in "Star Trek II" and would also appear many years later, in the sickbay of the USS Discovery.
Present-Day Devices as Props

Picard's room at Starbase Earhart shows some similarities to Wesley's room at Starfleet Academy in "The First Duty", as several set pieces were re-used for this episode.

The set contained at least three different models of black fighter planes. One can barely be made out on the shelf in the background in the first screenshot. The two other models can be seen in the second and third screenshots. The model on the right is clearly a B-2 Spirit. It was likely rented from Modern Props. The other two aircraft could not be identified so far. The large shelf behind Picard's friends was previously seen in Wesley's quarters in "The First Duty".

The Bonestell Recreation Facility features several decorative elements normally associated with the Klingons. The wall draping seen on the left of the first screenshot was originally seen in K'mpec's quarters aboard his ship in "Reunion". It was also seen on Gowron's ship in "Redemption I".

The second screenshot features several glavins, originally created for the Ligonians in "Code of Honor". In later episodes, like "Reunion", Worf kept a glavin in his quarters.

The Klingon shield seen in the third shot originally appeared in a Klingon bar in "Redemption II" but will later be seen in Worf's quarters in "Parallels".

Members of this alien species, nicknamed "tailhead" by the make-up department, wearing the same costume, often appeared on the promenade in various DS9 episodes.

The alien in the background was also seen in several DS9 episodes. His make-up and his costume were originally created for the Promellians, seen in "Booby Trap".

The windows in Picard's quarters at Starbase Earhart are the same as the windows in Wesley's cadet quarters in "The First Duty".

The aft and front section of the starship model in Picard's quarters can also be seen on the second and the third cap.

The two LCARS graphics behind Data were already in place in "Face of the Enemy".

The graphic on the right was originally created for "Ménage à Troi".