I got a dog at the start of my third year too, best tips would be make sure you have plenty of time before the start of term to get the new dog used to his new place, and buy loads of distraction toys for long days - mine loves 'kong' toys frozen with dog food/yoghurt. Having a dog at uni is amazing but I did find it hard adjusting when studying, make sure you work well studying at home, I found it hard not being able to spend long nights up at the university library because I couldn't leave him alone for too long.