Probably making better choices in school, which A Levels to take, which degree to apply for, and studying better throughout because I only really learnt how to study during my degree.

Although, I went to a school which was awful in terms of A level choices, so many of the options I wanted to take just weren't available to me, like double maths and computing.

Also, none of my family had any experience of studying past 16 or going to university, so I was left to figure it out for myself.

I did really well in university, but discovered that it didn't matter when finding a job because companies look at A Level grades, and I was competing with candidates who went to great schools producing 4-5 A Levels with good grades for even average pupils. Nobody in my school did more than 3 A levels, and even the cleverest students were mostly getting B grades.

I did find a job, but missed out on all the graduate positions that my university peers were getting. It was a programming job with a company that didn't invest in its staff, and lasted until the financial crisis, and now I drive buses for work because that lack of investment left me with only outdated skills.