I've learned the key to overcoming this challenge is to take the problem areas and break them into bite-sized chunks. It can't all get done at one time. One of the most important and easiest tasks is to set the goals for an area.
1. What is the space supposed to do?
2. What items NEED to be in the space?
3. What can you get rid of?
4. What are the steps to accomplish your desired end state?
One of my top goals for each space (whether I choose to admit it or not) is to make things prettier. I want to clean things up, put things away, find a place for things AND THEN make it pretty.
Honestly, I think I get it from my mama.