Do:
Take spares specific to your bike. As bikes get higher end and more specialised the components get more individualistic and hard to get hold of. A humble spoke or two breaking could be crucial to your camp, with replacements hard to source even somewhere with a multitude of shops like Majorca. You don’t want to end up on a hire bike while your pride and joy awaits repairs.

Don’t:
Make weight loss your target for the week. It’s more important to fuel your riding correctly so that you can train hard and effectively. You will be training significantly more than at home and under-fuelling will leave you fatigued and more at risk of illness.