If you don't get up in time for housekeeping and eat mainly snacks from vending machines : two coke cans will fit into an empty pringles tub to maximise the length of time you can go without emptying your ridiculously tiny bins.
If you can't work the shower, and are scared to try jiggling anything else in case it breaks, try pulling the rim of the tap, where the water comes out as that is way less embarrassing than calling down to reception three times and eventually having to have someone from maintenance come up to show you.
Check everything you're going to want to use before unpacking because once you've got all your stuff out before finding out the TV doesn't work you'll be annoyed even if they kindly offer to move you to another room and will make a good five trips with arms full of trailing stuff before you've got everything from one to the other.
Watch the Family Guy episode where Peter gets a job as a maid, so that even when you are awoken at some ungodly hour by someone knocking on the door and screeching 'housekeeping' it will make you laugh rather than throw something at the door.
Take, keep and use earplugs - there is almost nothing other residents of hotels will not do,
in order to stop their fellow guests from sleeping, up to and including strangely rowdy parties, an apparent desire to rearrange whatever furniture can be moved without unscrewing it from the floor or weird, loud conversations with their friends in the wee hours of the morning about the middle east during which they display surprisingly comprehensive albeit wildly inaccurate views on the history of the conflicts taking place there.
