When it is time to raise money for an organization, we naturally assume that the more fundraisers we produce, the better chance we have of making the largest amount of money. Unfortunately, that is not usually the case.
A better mindset would be: The more effort we put forth, the better our result. The downfall of many groups who are trying to raise money is that they over-extend themselves, and their customers.
Many times, customers (family, friends, neighbors) are more than willing to help out when they can...but after Little Johnny comes by with 7 different fundraising brochures in the time span of 2 months, it gets tough. While they would love to help out, they simply cannot afford to spend money on multiple fundraising items, no matter how worthy the cause.
Likewise, the members of the group will suffer when multiple fundraisers are done at the same time, or in a quick succession. Constantly asking people for donations, or purchases can be tiring, and when groups are attempting to do more than one fundraiser at a time they are let down twice as much when one person gives up. Most fundraisers have a minimum amount of products or items to sell - when you decide to do more than one fundraiser its important to set realistic goals for both seller and buyer. While Johnny may be up to the task, not everyone he is selling to may want to buy both cookie dough and flower bulbs.
It is more effective to concentrate your energies in one area, rather than stretch yourself out so thin, that you cannot cover either minimum amount. The best thing to remember is that if you can do one fundraiser, and do it really well, then other fundraisers will not be necessary.