Book attraction tickets early online if visiting Italy during peak seasons

Peak seasons in Italy are July, August, December, January. If you are visiting Italy during this time, you should book tickets to popular museums and cathedrals online. You can book them on most of those site's official websites

By booking, you can not only make sure you will have a ticket (popular sites have limited daily tickets, you won't be able to get in if daily limits are out) you also get to skip the huge lines!