Starting on a new layout can sometime be a tall order to take on. But it also can be motivation to get your butt in gear to get off the couch and get going.!!! What helps me is looking back at old photos of some of the layouts I've built in the past. The work I'm most proud of to date !! Is my old R&P Lumber Company (R&P stands for Rundown & Poor). It help me see where I came from in the hobby and the mistake I made while building it. And where I need to go getting starting on my new G scale R&P layout. So if you get in a rut and can't get going try looking at your past work or works of others to get you going.
Just a quick tip. !!!!
Also if you can post photos of your work your most proud of.