There is one thing that you can do to ensure a clean bedroom-it's monotonous, but very simple: MAKE YOUR BED!
When you make your bed daily, the rest of the stuff strewn about begins to look out of place and you become motivated to spend a few minutes picking up after yourself. Here's my bed--it's not perfect, but it's done!
I learned this lesson from the FlyLady. My sister-in-law Angie introduced me to the FlyLady, and much like the coupons it took me a loonnng time to come around. Now, I am in full control of my household and am always ready for surprise company (although I still appreciate fair warning!). This month, the habit that FlyLady is reinforcing is making the bed--and I thought I'd encourage others to pick up this habit.
Making my bed daily has made a huge difference in the overall appearance and cleanliness of my room. Don't stress out and be a perfectionist- just do it.