If you only get two things right after a big night, make them sleep and water. They are not glamorous, but they do most of the heavy lifting in recovery. Everything else is a bonus on top.
Rehydrate slowly and steadily
A long, hot night leaves most people short on fluids. The fix is gentle and steady, not a sudden flood. Keep a glass or bottle of water near you and sip it regularly through the day. Adding some food helps your body hold on to what you are drinking. If plain water feels like a slog, a squash or a soup counts too. The aim is little and often until you feel normal again.
Make sleep easy to fall into
After being awake and overstimulated for hours, your body sometimes struggles to wind down even when you are shattered. Help it along. Make the room as dark as you can, keep it cool, and put your phone down well before you want to sleep. If outside noise is a problem, a pair of earplugs can soften it and make dropping off easier. Earplugs reduce noise exposure, and at home that simply means a quieter, calmer space to rest in.
Do not fight the tiredness
If you can nap, nap. If you can have an early night, take it. Trying to power through on no sleep usually just stretches the rough feeling over more days. Giving in to the rest gets you back to yourself faster. Recovery is not something to rush.
A simple aftercare routine
Water by the bed, a dark cool room, phone away, and permission to rest as much as you need. Add a proper meal when you can face one. That is the whole routine, and it works. If you ever feel genuinely unwell rather than just tired, check in with a medical professional. This is everyday comfort advice, not medical guidance. Rest up, drink up, and take it easy.