The exterior and front door must be inviting, and the entrance area must be clean, and freshly painted. Paint or replace the front door if necessary. If the lock or entrance handle doesn't look new, replace it. Place colorful potted plants at the front entrance. If buyers are turned off before they enter, it's almost impossible to turn them on again.
The first impression you want to give buyers is one of cleanliness. Hardwood floors must be free from all dust and should be polished. If there is furniture, it should also be clean and polished. Prospective buyers may be accompanied by agents, family, or friends, and they will pause in the entrance area. Make sure there is sufficient room.
A kitchen can sell a home, but it must be great. Put away the coffee maker, blender, toaster, etc. after each use. Sure it's a bit of a hassle, but you're going for "Best in Class," and you won't be if you're not willing to make a few small sacrifices.
NEVER leave dirty dishes, towels, or food in view. Clean out the cabinets and pantry. If you find things you haven't used in a year, you're probably not going to use them. Donate or sell them. Buyers need to feel that their stuff will fit in your space. If you have an "eat-in kitchen" set the table or bar with nice dishes and linen napkins.