Waking up earlier, keeping fit, and building strong networks of friends are all forms of investment as well. It is important to realize that you must first learnt to invest in yourself before being to actually invest in others.
So when you take that little bit of time out of your day to write a blog, read a book, do some homework, you are essentially investing your most precious commodity, time, and thus gaining some sort of benefit from it in the future.
If you work hard.. Supposedly you will get a great job at some office where they will pay you a lot of money to provide services to the company, and maybe some of the women in your office will end up looking like her.
The upside of investing is that once you can view it in a broader sense beyond money, and focusing more on more 'abstract' forms of investing, you realize that every drop of time can be utilized to bring you success from every part of your life.