While most buyers will clean the home to their own standards before moving in, regardless of a sellers efforts, following is a list of things a seller can do to leave a home reasonably clean and create goodwill:

CLEANING INSIDE THE HOME BEFORE MOVING OUT:

1. remove all personal property
2. vacuum the floors
3. clean kitchen appliances, inside the fridge and oven, wipe down counters
4. wipe down interior cabinets and shelving
5. wash tile and vinyl/linoleum flooring

CLEANING EXTERIOR OF HOME AND GARAGE/SHEDS:

1. remove personal belongins
2. throw away trash
3. properly dispose of toxic chemicals
4. stack items pertaining to the home such as paint cans, roofing materials or extra flooring
5. sweep floor of garage

In essence, my best advice would be to leave the home is the condition that you would like to find your new home.  Remember, the new home owners might receive some of your mail by mistake or packages over the holidays.  It's a good idea to stay on pleasant terms with the new buyers.  But most importantly, it's the right thing to do.