Having good SEO results in Google actually requires smart money management. We really never talk about this but many people should be more aware about this.
It takes money to rank
It takes money to register domains, pay for decent hosting, buy designs & graphics, hire writers, etc. Yes, you can do just about all of this on your own with almost no money. Honestly though you probably shouldn't. It is highly unlikely that you are an expert in every field and utilizing your subpar DIY skills to save money is probably not smart.
Save for a rainy day or a bad update
None of us control Google so we need to be ready for our business to respond to Google when it makes adjustments. Hit by Panda? Having some saved money will help build up better content. Hit by Penguin? Having some money will help clean up the link mess. Hit by mystery ranking drop? Be brave enough to admit you don't know everything and have some money to hire another SEO for a second opinion and help. If you spend the money as fast as it comes in, you will not survive when your business hits a problem.
Learn from the money mistakes of other SEOs
I have seen many people who used to make huge amounts of money from Google rankings (private jets, multiple homes, etc) lose their homes and business. The lesson I learned is not to assume the money you make today will be available tomorrow. Assume you will need to constantly rebuild your Google rankings and that each rebuild will be more difficult and costly. It is wiser to plan for the worst than spending like it will always be the best of Google rankings. Live below your means so you can build up savings that you can invest in your website.
Only you can protect your money
Even if you smart enough to save up for a bad day that is not enough. Invest wisely in your company. Don't spend money on every fad or overspend on good ideas. I remember years ago some of my SEO friends where spending $$$$$ on video and never turned a profit. I know others that lost 90% of Google traffic and then hired an "SEO" who was expensive but stupid and just made the situation worse. I love paid link tools but if you buy all of them you are wasting money. So make sure you spend wisely. No one will protect your money except for you. Every vendor will say buying their product/service will make money but often it is just the opposite.
What words of wisdom do you have when it comes to money management & Google SEO?