Multitasking is a great way to nibble at things without making solid progress in any of them. Humans are designed to work on one thing at a time. The key is breaking down things into manageable chunks that you can get through one at a time. That way, you can work on chunks of different projects, yet still be able to give each chunk your full attention. Some of what I say may sound familiar. It's part of the Getting Things Done method. For more information, check out http://gettingthingsdone.com. I've been a practitioner for 4 years, and it's turned my ability to handle workload right around.
And Change is inevitable in this area managing it separates the good from the better, and best.
And remember, as you go through change, so does everyone else. It isn't that change isn't tough, it's about it being relatively easier for us than for most people.