Go non-traditional
If for any reason you can't go the traditional route, such as big lavish dinners and presents under a tree, you can find your own special ways to celebrate.
For example, if you can't spend hours slaving over a hot stove to make dinner, order takeout instead. Many people opt for Chinese food on Christmas, as they're usually open for business.
If you can't see your friends and family, try doing something special for yourself. Put on a nice movie and put your responsibilities on hold. It can be whatever you like that makes you feel good.
You can also try making up some of your own traditions. Maybe you don't like pumpkin pie, but instead like vanilla cupcakes. Maybe you can't have a tree, but have a potted plant you can decorate. Get creative and do what makes you happy.
Have dinner
The biggest part of celebrating Christmas is having a big feast with your friends and family. No matter the size of your party, whether it's twenty or just you, having a big holiday meal is a great way to celebrate.
The traditional Christmas meal is turkey or ham, potatoes, a vegetable, and cranberry sauce. You can experiment with different recipes, add your own, or do an entirely new thing altogether. Christmas dinner is about enjoying delicious food while spending time with the people you love, so do what makes you (and your guests) happy.
Decorate
The quickest way to get into the holiday spirit is to decorate your home. You don't have to rush out and get a ten foot tree, even simple changes like putting up a garland or a stocking can get spruce things up and make everything a little more festive.
If you're on a budget, try going to the dollar store. The dollar store is sure to have tons of decorations at a low price, that are relatively easy to put up. A decorative bauble on your bookshelf or a fake miniature tree are great places to start.
