Raise Funds. Raise funds from people and organizations for a trip or project. However, if you do something a little different, you may get more volunteers. You may also get more media exposure meaning more people will participate which means more money raised.
Vegetable Sales. If you have a garden that provides vegetables more than your family ever uses, you may then sell these at a roadside stand for good old-fashioned greenery.
Pet Walker/Washer. This is not a new idea, but still a good one, especially if you live in an area or neighborhood that has pet owning couples, and both work outside the home. Make sure to meet with both pet owner and pet beforehand, so that you will be capable of handling the animal. Business can offer one or both services.
Solicit Fund for Political Groups. Political candidates are always looking for fund-raisers. Contact local political organizations and/or candidates and explain that you will help raise money on a commission basis.
Be an Instructor. Teach whatever you know. Your trade, profession, cooking skills, a second language, woodworking, chess, photography, knitting, karate, bridge, auto repair, etc. People will pay for good lessons in these useful and enjoyable skills.
Weight loss buddies. You could offer your "companionship" to people who want to lose weight and need someone there to make sure they are following their diet, doing their exercises and drinking their water.
Take donations. Collect donations on your official Website for a project or a regular event, you can promise donors that they will be recognized. This is similar to the common practice of donors getting their names put on a plaque, but the website is accessible to all their friends anywhere in the world so they can show them how they helped!
Start a Hobby Center. Make money on your unused space. Turn your basement into a wood working center, your spare bedroom into a photo darkroom, and your garage into a pottery workshop with a wheel and a small kiln. Rent the space and equipment by the hour, expand into more hobbies as time and money permit, and charge additional fees for instruction in any of those fields you are good at.
eBay Copywriting. If you are good at copywriting, go to eBay and look for highticket items like boats. Find auctions with totally sucky descriptions. Contact an owner and inform him/her that good description of his/her item is likely to increase the chances of that item being sold. Then offer your services for a 1% of the selling price. You can use free eBay software.
Convert your Hobbies into Cash. Are you an expert at something that you do at home for fun? Then make it pay off for you. If you are a gourmet cook, give cooking lessons in the haut cuisine. If you are an accomplished painter in oils or water-color, offer a portrait-painting service. If you are a skilled carpenter, design and make custom cabinets to order. Almost any hobby you are good at can be turned to making a profit if you think about it carefully, and decide who could use your expertise - as a consultant in that field, if nothing else. All you really have to do to get started is to place an ad.
Panhandling. A panhandler is a person who depends on the spontaneous charity of strangers for their survival. In some parts of the world, begging is the only alternative to starvation, especially in the context of a poor economy or an oppressive government; in other parts of the world, panhandling is illegal because of its association with addiction and irresponsibility. You never know when you might have to ask strangers for help, whether you have been mugged in a foreign land, and need enough money to make it home; or life deals you a particularly harsh hand of cards (like abuse, disability, illness, war) or you become so dissatisfied with your existing options that begging seems like a better alternative.
The following are somewhat pure imagination, it is upto you to find a way to make these ones into potential money making ideas!