How to get over Post vacation depression/blues?

I live in Ontario Canada, and recently got back from my UK/Europe trip. Went to london and paris, and had a good time seeing the sites there.

I feel sad that the holiday is over. Everytime I see a big office building I think of the UK, everytime I see a pastry I think of France.

I know it is temporary but what are some ways to get over it? I heard planning the next vacation works? OR talking about how good your life is and be grateful you are able to travel compared to other people.