Never go empty handed!
The most simple piece of advice I can give is this: never leave a room empty handed! If you have a cluttered room or space, start clearing it now. The easiest way to do this is by identifiying what things do not belong in that space. Next time you go to the room they belong in, load yourself up! You can start with one or two things at a time. The best strategy is to deliver those items to their proper home. Don't just throw those things on the floor, dresser, bed etc. Actually put them away. If you do this everytime you go to a room think of how fast your house with be de-cluttered!