Jupiter: As the year starts, Jupiter is visible in the east well before midnight. It reaches opposition on March 12 and it’s very well located for evening viewing from then through May. By July it sinks into the west at twilight and then disappears behind the Sun. It returns in the dawn sky in November, but it’s not well placed again until early next year. Jupiter is heading southward, but this year it’s still far enough north (in Leo) to be well placed for northern observers.
The year, we’re looking from a direction about 2° south of the plane of Jupiter’s equator. At that angle, Callisto just grazes Jupiter’s south pole as it passes behind the planet. In the other half of its orbit, Callisto and its shadow just graze Jupiter’s north pole. The other moons all get eclipsed by Jupiter and its shadow and they (as well as their their shadows) all pass in front of Jupiter. This handy Jupiter's Moons link from Sky & Telescope Magazine will guide you to the moons and what they’re doing tonight.
As always, look for the zones and belts. Even when its color is subdued, you should look for the Great Red Spot in the southern equatorial belt within an hour or so of when Jupiter’s rotation brings it towards us (this handy Red Spot transit times link, also from S&T Magazine will tell you when to look).
Saturn: In 2028, Saturn is at opposition on October 30. It’s visible before dawn by June, by August it rises before midnight, and in November and December it’s well placed at the end of twilight.
To know where they are on any night, consult this useful Saturn's Moons link to from Sky and Telescope to keep track of them (they also have a handy mobile app).