Gap year ideas?

Just finished my A Levels, retaking a couple of units to sharpen the grades & working 20 hours a week at Waitrose, spending time in the gym, hopefully will learn how to drive and going to be practicing cooking and spending time with my family before uni - I want to have a really productive year and I don't want to waste it, so I was wondering if anyone had any ideas of what I could do to help me in the future? I'm also considering doing an internship or work experience next summer - any suggestions would be great