How do you craft a marketing plan for a small business?

I am currently studying resources that I can easily and freely come across to find what is critical in crafting a marketing plan. I recently stepped into the role of Marketing Manager and am finally getting to where I can get out of the trenches for a little while and get a bird’s eye view of what the company is really about. With this opportunity, I hope to take enough time to build a plan that will not only be a reference for the rest of the year, but a launch pad for years to come. I have spent time reading blogs and investigating marketing, but I haven’t seen a good step by step or list of necessary components for a plan. Any help with links or suggestions would be greatly appreciated.