Decluttering is a process. Your chances of lasting success skyrocket with a carefully considered action plan. You likely won't last long if you just grab a trash bag and start tossing.
Here are twelve things you can do, starting today, to help you get clutter under control. The first five will prime your brain to declutter. They will set you up for success.
Encourage your housemates to be part of the new plan. If they don't want to be part of your plan, you must determine how you can live with their decisions.
Commit to a plan, such as the downstairs bathroom on Tuesday, the front porch and hallway on Wednesday, the living room on Thursday, etc. If you are time-challenged, split the tasks.
The key is doing something very different than your normal daily activities, just for you. This activity can help keep your mind clear and your stress level low.