Swap your outlet covers with jumbo outlet covers.
26 Inexpensive DIY Upgrades That Will Add A Touch Of Class To Your Home
Old door on track - so cool!
Plain to Panel interior doors by adding cabinet grade plywood. approximately 30$ for wood plus stain or paint
Great tutorial on how to build a closet in an existing room.
Add Plinth Blocks to Door Trim for a Finished Look - The Handyman's Daughter
Tutorial: Custom Window Mullion Grids - The Rozy Home on @Remodelaholic
DIY: Adding Moulding to Door Frames | The Painted Hive