This may be old news for some of you, but for those of you who haven't seen the "Innovation in Design Credit Catalog" from the USGBC you're really missing out!
This is essentially a giant, FREE spreadsheet that chronicles EVERY IDc1 credit submitted (and presumably accepted) before the Summer of 2007. Much like any commercial for financial services, there is a disclaimer that essentially says "past performance does not indicate future results". With that in mind, you can't assume that directly copying one of these past strategies will work for you.
Forgive me for my point-mongering ways, but if you're right on the border between gold and silver you might find a few things already in your project that you could submit if you have a few IDc1 slots left (there are four total). These are organized by category.
I was surprised by how little it can take to get a point. One project applied for a point by stating that the owner would provide all employees with reusable coffee mugs to reduce waste, along with using fountain drink machines instead of can dispensers. While a great idea, this probably costs next to nothing and could be used in any project. As a whole though, most of the submissions were rather robust examples of great sustainable design ideas.
If you have any suggestions for great ID ideas that could work for many projects, please share you thoughts in the comments section!