Clear immigration, grab an airport SIM and take the KLIA Express (28 min) or taxi to Bukit Bintang for central access; this saves time and avoids rush-hour traffic.
Check-in to a centrally located 3-star hotel (Bukit Bintang or KLCC). Lunch at Jalan Alor street hawkers or the Lot 10 Hutong food court — great for local dishes and budget-friendly.
Visit KLCC Park for Petronas Tower photos and walk around Suria KLCC. Petronas Skybridge visits must be prebooked — ticket slots often 9am-9pm (book in advance).
Sentosa has beaches, S.E.A. Aquarium, and attractions; S.E.A. Aquarium typically 10am–6pm. Universal Studios is open 10am–6pm/7pm (ticketed, more expensive).