Veteran of a week long stay with my first, and a fortnight stay with my second.
Get off the ward for at least an hour or two a day. The midwives won't want you to leave the hospital grounds in case you turn eclamptic, but so long as you stick to busy areas (within the grounds) or have someone (i.e your partner, friend, family) with you it should be fine. But just don't go far. Have a walk, have a coffee, breathe the fresh air, enjoy whatever the British summer weather currently is.
Rest as much as you can. 4 hourly OBS are a pain, especially at midnight and 4am, but what can you do other than make up for the disturbance during the day. Have your own pillows bought in, and a blanket too if you like. Nothing like the smell and feel of home to help you to sleep.
Download as much TV/movies as you can. Unless your hospital has good enough free wi-fi ofc. I read loads, and I even got out my Where's Wally books for a change.
One day at a time, though after a while they start to blur together.
Resist the urge to beat senseless anyone in your bay complaining about how long they've been in hospital when you've already surpassed their stay by over a week. Looking at you woman opposite me in my second pregnancy.