If you know what you're supposed to be doing and you're not doing it, you're procrastinating. If you don't know what you're supposed to do and you're not doing it, you're not procrastinating, you're thinking.
There are times when you aren't ready to take something on for one reason or another. It may be that the first step to whatever goal you've set for yourself is that you need to freewrite about it, in other words brainstorming to yourself.
If the project is new, unfamiliar and intimidating, it's easy to look up at the wall in front of you, turn around and put it off for another day. I've found that just sitting down and writing it out, thinking it through on paper, letting your thoughts flow and capture them can make the wall come down.
Once something like this is faced in tangible form, composed by your own handwriting, it takes on a new dimension of possibility. It will force your brain to search itself for ideas, connections and neural responses that you will read later and wonder who wrote them.
Keep a notepad or some other kind of "thought capture tool" handy because once you start this, ideas will come to you at the oddest moments. Get them down... listen to yourself, the answers are there, you just need to trust the process.
Do this for what's facing you now, and go jump start your day.