The movie starts off showing Jenna at 13, awkward, uncomfortable, and just wants to fit in with the popular crowd. Jenna dreams of what every 13 year old girl wants, a boyfriend, to be cool, and to be considered beautiful. She has her best friend Matt and both are considered dorks. While at her birthday party Jenna gets embarrassed by the popular girls and wishes to be 30 years old because she believes she will be successful, have a boyfriend, and be happier. When she wakes up she in fact thirty with a career, boyfriend, and full life she did not remember. While Jenna discovers what her adult life has been like she sees that growing up isn't all its cracked up to be.
Throughout the movie Jenna starts to figure out some of the life choices she made and who she grew up to be. The person Jenna is as an adult is not who she wanted to become in the slightest. The first lesson the movie gives is stay true to yourself. Changing to try to fit into a "social norm" or just to be considered cool for a few minutes is not worth losing yourself in the process. Jenna lost herself with trying to mold herself into the "perfect girl" which does not exist. An individuals personality changes somewhat as they begin to mature but not drastically that they become a whole new person.
The second lesson the film teaches is that the best relationships can blossom from the simplest of friendships. A friend knows you well at first, you have trust with them and an obvious connection to have some sort of relationship. If the friendship turn into something more then its great because you already know the person but then develop a deeper connection. Jenna falls in love with her best friend. someone she trusts, cares for, and has a strong foundation with. Basically keep an open mind about relationships, your perfect person can be right in front of you.