If you have rough walls to cover one option is to use a textured wallpaper to give a fresh new finish look as above. And if your fed up with your dull looking stained or varnished woodwork how about a change to white as below to transform your room to a modern bright look.
Below you can see another example of how a change from varnish to white satinwood paint can transform a hallway.
Is your exterior paint starting to flake exposing the woodwork to the weather, a good primer undercoat and gloss not only looks good but protects the wood. I highly recommend dulux weather shield for long lasting protection.
Using wallpaper to create a feature wall can look very effective.