Whether it’s for six or 16, the key ingredient for a successful dinner party is planning. When you plan ahead, there’s no worry that something’s been forgotten — and, chances are, you’ll have as good a time as your guests!

Begin by making a list of what you need to do. Check things off as they get done, and write in new ideas as they come to you.

• Pick the date and time: Check the calendar for holidays and local events that might prevent some people from attending. Weekends are usually better for those who work or have children.
• Prepare your guest list: Mail invitations or call your friends a week or two before the big day.
• Think of a theme: It doesn’t have to be a special occasion like someone’s birthday. “We got a new puppy” or “I just got a job” will do just fine. A theme will help you develop the menu and design centerpieces. It will also get the crowd in a festive mood.

Keep the following in mind when planning your menu:

• Choose a main course you’ve prepared at least once before so you know it will turn out well and be ready on time.
• Include items that can be made ahead. Wrap them tightly and store in the fridge.
• Select foods that go with your theme. “We just got back from Mexico” might suggest enchiladas and tacos. If the theme is more general, anything goes — but serve an unforgettable dessert, such as cheesecake or Key lime pie.
• Consider guests’ food allergies or special requirements so no one feels left out.
• Buy all the ingredients a few days in advance. Then, if one or two are missing, you’ll still have time to buy them or change the menu.

A centerpiece doesn’t have to be fancy or expensive. Yes, candles and flowers are nice, but how about something different? Try a group of toy fire engines for a hot chili dinner or a big bowl of shells for a fish fry. They’re both fun and inexpensive.

Don’t be afraid to ask your friends and family for:

• A little help: When friends ask, “What can I bring?” be specific — dessert, extra glasses or chairs, even an hour of their time in the kitchen. Mail a thank-you note the next day or give them a big bag of homemade cookies when the party’s over.
• A lot of help: A potluck dinner is one of the easiest kinds of parties to have. Everyone brings a dish — appetizer, main course, salad or dessert — while you provide the house and beverages and take care of cleaning up. If you decide on a potluck party, suggest a variety of foods so they add up to a balanced meal.

Don’t forget to get the kids involved if they’re old enough to go grocery shopping, polish the table or simply clear out their stuff from the living room and dining areas. Ask them to pass around the appetizers or help serve dessert. They’ll enjoy being part of the festivities and you’ll have one less thing to do.

Organize as much as possible the day or night before: Set the table, arrange the centerpiece, thaw anything that’s frozen. The day of the party: Take a relaxing bath and listen to soothing music. Then go, get dressed and have a wonderful time!