My two cents:
Walk the Bosphorus, the Ljubljanica, the Hohe Tauern, the Thames, Crib Goch, the shores of Loch Hourn, and the crest of Bla Bheinn. Check out the northwestern corner of Bulgaria, the castle at Smederevo, the bridge in Škofja Loka, and the houses in Kropa. Watch the sun set from the church on the Dobratsch, and listen to ice fall down the Jungfrau. Listen to muezzins and Austrian church bells. Go to the cathedrals of Strasbourg and Amiens. Visit the Bodleian Library and see what’s happening in Liverpool. Go up Buachaille Etive Mor and look long and hard at An Teallach, because if the weather is good, these things are special.
Understand that things could go seriously pear-shaped in Slavonia, the Lake District, and anywhere affected by the Bura.
When desperately in need of greasy fast food, eat kebabs in Istanbul, Ljubljana, and Glasgow; hamburgers in Burgas; and burek across the Balkans. It can be hard to find useful cheap food to snack on in rural Turkey, Serbia, Slovenia, and France, so when burek is near, eat burek.
Avoid Balmer’s Herberge in Interlaken if you dislike the idea of utter hell, and the Blue Planet Hostel in Paris if you value, even in the slightest, hygiene – for my part, I met a drummer from Guadalajara at the Blue Planet and stayed up until three or four in the morning talking, so I say, who needs clean? Say hello to the people at Zeppelin in Ljubljana, because they rock.
Walk Byres Road on a winter day.