I 2nd Scandishake - the caramel one is delicious and is 600 calories when mixed with 250ml of whole milk. Lighter to carry than Ensure too. Although Ensure is fab as it comes in so many varieties, including a juice form.
I found I had sensitivity to temperatures and ended up drinking lukewarm coffee and tepid water. Anything else was too much.
Minty toothpaste was a nightmare so I had to find a flavoured one, and use a soft brush.
I tried to keep active as possible, but also enjoyed a daily nap. The 2 really helped my body and mind when going through all of this.