As the star gets ready to serve time behind bars – she has until July 20 to surrender to authorities – she's turning to self-help books to assist in turning her life around.
Her first must-read: Toxic Friends: The Antidote for Women Stuck in Complicated Friendships by Susan Shapiro Barash, a gender studies teacher at New York City's Marymount Manhattan College.
Lohan, 24, was spotted carrying the book in L.A. Sunday night, just hours before she and her ex-girlfriend Samantha Ronson met up.
"A friend recommended the book to Lindsay to help her get through the these tough times, and for her to appreciate who her real friends are," says a source, adding that even though Lohan was spotted with the book before meeting Ronson, the actress doesn't consider her famous deejay ex a bad influence.
While Lohan is juggling her legal woes, she's focused on improving her quality of life – particularly her social circle. "Lindsay's cleansing herself of all the toxic influences in her life," says the source.
And one way she's doing that is reading the book, which helps people "figure out which [friends] you should keep and which ones you should rid yourself of," adds the source.