Boosting your income just a little bit can go a long way. A 20-year-old, for example, who invests that $100 every month in a plain fund that tracks the S&P 500 will retire a millionaire. Here are 9 ways to generate an extra $100 a month.

1. Join an Affiliate Program: An affiliate program can offers great products and pays commissions for referring other people to the group. Over the course of time it could change your life as you earn commissions off your referrals’ referrals.
2. Sell on Ebay and Craigslist: That stuff sitting around collecting dust is valuable to somebody. Do some spring cleaning by selling some extra things around the house, or do some bargain hunting and flip your findings for a quick profit. Get a list of wholesalers and drop shippers to source hot products that move fast to sell.
3. Online Surveys: Get paid to take free online surveys. Completing just a few online surveys a month can be a quick way to make an extra $100/month in your spare time.
4. Word Processing: There are a lot of people who do not have a computer or know how to type well. Advertise your services to type up reports, letters and documents.
5. House Sitting: People who travel need their plants watered and their dogs walked. Put an ad on craigslist.org for your services and see if you can get paid to watch over their house for them.
6. Design Websites: If you are technically and graphically savvy, building custom websites can be a lucrative side business.
7. Baby Sit: Babysitting can pay handsomely if you create a niche for yourself.
8. Donate Plasma: Donating plasma is a process similar to donating blood, but pays about $25 and can be done once a week.
9. Mystery Shopper: Mystery shopping pays you to go shopping. Retailers and shoppers will pay you to pose as a legitimate shopper, even though you are actually rating employees and the store on attitude, cleanliness, etc.

Millionaire Money Habit: A small amount of money can go a long way when The Power of Compound Interest kicks in. Not having enough money to invest is an excuse that can easily be solved with a little extra effort.

This is a quick reminder about this week’s contest (link) to win a free copy of The Rules of Money. The contest ends on Friday at midnight. Will you be the winner?

One winner will be selected from the following categories:

• Most Traffic: The website that sends the most visitors to Millionaire Money Habits will be awarded. The traffic can originate from a single link to a particular article on this site, or multiple links. It doesn’t matter how you drive traffic, only how much traffic counts.
• Comment Counts: The reader who makes the greatest contribution by commenting wins. In order to keep comments pertinent and of value, a point system will be used for each comment. 1 point will be awarded for comments that don’t facilitate discussion, and 5 points for each comment that offer a substantial contribution to the article’s topic. Comments can be added to any article on this site, and the commenter with the most points wins.
• Random Subscriber: A new subscriber to Millionaire Money Habits’ RSS feed will be randomly selected to receive a copy of this book. All you need to do is subscribe to this site by filling out the “Receive email updates” form found at the top of the left sidebar. Be sure to check your email to confirm and validate your subscription.

Results of the winners and runner-ups will be announced on Sunday.

Good luck!

Creating and sticking to a budget is one of the key ingredients to building wealth. In order to set aside enough money each month to invest and reach your financial goals, you need to understand your cash flow - or your income and expenses.

By creating and analyzing a personal income statement you can find inefficiencies in your spending and take control of your finances.

Here are two excel spreadsheets that can be downloaded to help you set up your budget. Just plug in the appropriate numbers and the calculations will be done for you.

Click here to download these free budgeting excel spreadsheets:

• Simple budgeting tool
• Advance budgeting tool