Head straight past the queue into the Vittoriano complex. The visit route runs one-way, from the Piazza Venezia gate, and ticket required for this part. From inside, ride the glass elevator up through the Sommoportico to the Terrazza Panoramica, the widest 360° viewpoint over Rome, taking in the Roman Forum, Colosseum, and on clear days the dome of St. Peter's.
your ticket also covers the Museo Centrale del Risorgimento, tracing Italy's 19th-century unification through uniforms, weapons and personal artifacts, temporary exhibitions. A short walk brings you to Palazzo Venezia, the 15th-century palace museum with its Renaissance art and sculpture collection — and just outside it, the Giardino Grande di Palazzo Venezia.
Because the ticket is valid for 7 days from the date you buy it, there's no need to rush. See the terrace and museum today, come back for Palazzo Venezia later in your trip. Note that each paid site can only be entered once per ticket, so plan your route before you go in.