Here are some tips to help you through step 1:
Collect images at random. Collect images that speak to you emotionally without thinking about why (at least for right now). Believe me, there's a pattern there — you may not be able to see it at first, but a pattern will show itself. You may find that a whole bunch of your kitchen inspiration images may need to be added to an ideabook for a future farmhouse or weekend getaway, but don't skip over them just because they don't relate to this project, save them for later.
Don't edit yourself (yet). Don't make yourself nuts from the get-go by trying to edit as you collect. I really believe in collecting with reckless abandon first and editing later. Editing yourself while you gather inspiration is certain death for creativity.
Organize (but only if you want to). It's OK to be unorganized and even a little messy — this is creativity after all! So what if your collections are a bit of a mess with no rhyme or reason. If you are fabulously organized, then you're a step ahead of us, but for those who aren't, don't sweat it. There's time to go back over all this stuff and label it later.
Start looking for a pro. This can be a great time to start noting the professionals who are responsible for the designs you like and looking for a design professional you might like to interview. For some homeowners, the right thing to do is hire a professional out of the gate and have him or her help you through this inspiration-gathering phase. Some homeowners even hand this off completely to a designer, and it's the designer's job to listen, interpret and collect inspiration for the client and bring it back for approval.