First order of business, find a local coffee shop and grab a cold brew to go. Entry to The Broad museum is free with appointment or you can take your chances in the standby line, but I suggest coughing up the $12 entry charge for their special exhibition, which will grant you access to the full museum. MOCA is just across the street, but save it for a Thursday evening between 5-8pm when Wells Fargo sponsors entry and you can browse for free.
The Last Bookstore is a downtown gem, and their second floor boasts a maze of books and local boutiques that one can easily explore for hours. It’s the largest new and used book and record store in California, and you’re bound to unearth a few classics to stow in your carry-on home.