When my mum had chemo she ended up with loads of bruises from all of the needles. Arnica cream helped reduce the bruising.
Nice hand cream and moisturiser to combat the drying effects of constant hand washing and effects of the chemo. Nothing too scented though as strong smells can cause nausea.
Fleecy pjs and socks and warm slippers.
My mum found it impossible to eat proper meals as she could only manage small amounts. She liked having snack type foods, eg chilled picnic foods, as she could get a few mini sausage rolls/pizza parcels/mini scotch eggs etc herself while my dad was at work. I'd call in twice a day to get anything she needed while my dad was working but she hated having to rely on others for everything so having thing she could just grab helped her feel less dependent.
Regular phone calls, whether you just listen, talk about how she's coping, about the weather, or whatever. As pp have said there's usually lots of people helping and calling in the early days but these soon trail off and it can become very lonely. At the end my mum only really had my dad, me, dh and my in-laws who were there regularly, my mum's sister /family /friends hardly contacted her or us after the first couple of weeks and I'll never forgive them for it.
Audio books or a subscription to Kindle audio books was something my mum appreciated. She was bored during the treatment but couldn't concentrate to read but listening to books was easier.
Ask her how she's doing when you call/text but take her lead as to whether she wants you to be positive or realistic. At first my mum, and all of us, tried to be positive and say she'd beat it even though the prognosis wasn't great. It got to the point that my mum knew she didn't have long and all the well meaning stories of how so and so was given a prognosis of 3 months but lived 10 years started to grate.