I carried a little dictionary with me everywhere I went, as well as a notebook in which I listed any new words I heard. 简单句，并列句，还是复合句？

是复合句。
I 主语；carried 谓语；dictionary 宾语；with me 和 everywhere I went 是两个状语，其中 （which）I went 是定语从句，修饰 everywhere。
as well as a notebook in which I listed any new words I heard， 是状语从句，表示伴随情况，其中in which I listed any new words I heard 是定语从句，修饰notebook；（that） I heard 也是定语从句，修饰words。