This is very simple to do, but also very simple to screw up quickly. To sum up this lesson: be as clear as possible from the get-go about what your project is about, what the backers will receive, and how the project will be run. If you show everyone a gold iPhone accessory in your video or project page and then 1 month in you change the color to red and add a bunch of speed holes, people may not be happy. They will rightfully feel misled, even if the product required the changes due to things outside of your control. This applies to ALL aspects of your project and how you communicate with backers and potential backers. If you work full time and can only respond to questions on the weekends, tell them. If you tell everyone and make the communication very clear and transparent, you will be far better off in the long run. I had one backer upset that I was charging 15$ extra for international shipping, but when I pointed him to the bottom of my project page which clearly stated that international backers should add 15$ he coughed up the extra 15$ and was not upset with me because I was upfront from the beginning on the matter.
Before you publish anything, proofread it for accuracy and clarity. Try to imagine yourself as a potential backer who knows nothing about you or your project. Is the language simple? Are the pictures beautiful? Are the rewards easy to understand (shipping add-ons, foreign shipping, etc…)? If you lived overseas and didn’t speak English as a primary language, would you be able to understand this project (there are many non-us Kickstarter backers these days)? Have the least tech savvy person you know try out your page and if they understand it then you are probably ready for the masses.