Many people host holiday parties in their homes at this time of year, but there are often small details that get overlooked during the preparation.  This list of 9 tips for having a great holiday party (complete with Christmas party shopping list) will help you remember these little things while you’re still in the planning phase. 9 Tips that Make Holiday Party Prep Easy 1.  Expect 1/3 of the people you invited to attend, but plan for double. You never know how many people will really attend your Christmas party, and it’s better to be prepared for more than to fall short of food or supplies. 2.  Shop in advance.…