Smart-Packing for long trips

Good morning folks! I am now on my way to DΓΌsseldorf to spend time with the family over the festive holidays. I spent all night packing, as usual worrying that I'd forget something majorly important. I always forget something haha! I still have a cold and because it's also winter the packing always becomes more than in summer,when all you want to take is bikinis. However with the right packing technique I can fit more than ...