If youre under 25 with eu student id you get free entry to state museums including Uffizi Palazzo Pitti and Accademia year round. Bring student card and passport to ticket office not online booking. Saved me €68 during my week studying near Santa Croce.

Also aperitivo happy hours 6-8pm at university bars around Santo Spirito and San Frediano. €8 for spritz plus unlimited buffet food basically dinner sorted for student budget. Volume and Negroni bars in Oltrarno do this best local students not tourists.