I need a delicate way to tell my boss that I feel like I am not being trained and kept up to date.

I work in the marketing, advertising and sales. I work long hours and almost all the time, most of it is to just keep up with the work load. I do not have time to keep myself up to date unless I only want to live my job. I do not want to live to do my job I want to do my job so I can live. How do I let my boss know that I need him/her to do a better job of keeping me up to date on changes and communication?