Use small boxes for heavy items. It sounds obvious, but if you have ever carried a large carton full of university textbooks across a car park, you know the advice cannot be repeated too often.
Fill small boxes with heavier things and use large boxes for light ones such as decorative cushions, towels and bedding. A box should be full enough that the contents cannot slide, but not so heavy that nobody can lift it safely on a staircase.
Tape the bottoms properly, label two sides, and do not mix kitchen glass with books. If you run short you will improvise, and that is how things arrive damaged.
NorDecco Mudanzas can bring boxes and pack them as part of the transfer. If you need help with the move, call Jesus on +34 657 484 863 or use our contact form.