Your front door needs to be a clean, solid colour:
For humans, colour causes an emotional reaction. It will also say a lot about you and your style, so choosing a colour which represents your personality and sets the tone for the rest of your house is a great way to start making a good first impression. Think about the door knocker, the style of the door, the finish of the paint, the grooves, the accents etc. They all so much and so loudly
The doorway and pathway up to your house or flat should also be clean and tidy with good attention to detail. Nothing will make the guests feel more uncomfortable than standing outside your homes front door with a massive cobweb hanging over their head, or dust galor all over it!