This book is fantastic and there's a whole cult of folks online using this methods.
One suggestion he has for anything is write down the next physical thing you need to do to complete the action.
For example your vacation list shouldn't have
Plan vacation as an action item. It's more useful to have something get number of the travel agency.
Another useful thing is context. If you read this note late in the day, you might not be able to do major work on the project, but you might be able knock off all the little things you know you are going to have to do anyway. So focus on that.