If you are stressed and burnt out before your holiday then it is likely your immune system will be suppressed. When you get on holiday and start relaxing it can come bouncing back and start fighting some of the latent bugs that have been sitting around with you. All this translates to an unwanted cold for the start of your holiday. Try to prevent this by starting to incorporate some relaxation activities in the week or 2 before you go away (see next section for some ideas). You can also supplement with a decent vitamin and antioxidant support, such as MSC Immune Support, in the week or so prior to departure to strengthen your immune system as much as possible. This will also help you fend off the viruses from snotty children you end up sat next to on the plane.
The primary aim of a holiday for most people is to relax, however this isn't always as straightforward as just sitting by the pool and waiting for the magic to happen. Relaxation is an active process and requires some effort to fully achieve it. Most people complain that there isn't the time for such things in day to day life so a holiday, where you have plenty of time, is an ideal opportunity to put some effort into proper relaxation. Before you go try downloading some relaxation aids of choice. My go to options are Headspace, for mindfulness meditation and then Box Breathing and Apnea Trainer for breathing techniques. You can also search for podcast options that you could use on the plane for example. Tara Brach is a good place to start for meditation style audio. Try to spend a few minutes each day, especially at the start of the trip, to practice these and help you unwind. The shorter your trip the more you should practice.
If you are travelling abroad it can always be a gamble as to what quality of food is available. The last thing you need is to be trying to track down a remote hotel, on unfamiliar roads, in a hire car, with your blood sugar crashing and no shops in sight. Packing some simple nutritional insurance against such a situation can be a lifesaver and there are some great, easy to transport, snacks that are suitable. If you try to stick to a more ketogenic, low carb approach, like me then I'd recommend the Pip and Nut squeeze sachets. Just be warned that these are moreish and you could quite easily delete the lot before you've even left Britain. A less appealing, but equally useful, option is the Coconoil capsules. You won't be tempted to smash these down but they can help you get into ketosis, or keep you there, and keep hunger and energy crashes at bay. If you are less fussed about a fat dominant approach then stash some protein bars in your cases and you will be able to set out without worrying where your next meal is coming from. It is also worth packing a few activated charcoal tablets which will save you from stomach based strife should you encounter a dodgy local delicacy or imbibe too much of the local brew.
Improving your mobility whilst on holiday is hardly going to be a priority but is perhaps something you should consider. The travel involved in going anywhere means that you are likely to be sat in compromised positions for long periods of time. This all translates to tight hips and a severely achey back when you land, not a recipe for holiday bliss. Chucking a simple lacrosse ball in your bag means that you can trigger point away any tight spots and impingements on day 1 and then crack on with the rest of your holiday pain free.
Sleep is one of the foundation pieces that affects pretty much every other part of your life, particularly your mood. Going away and sleeping in a strange bed and often in a hot room can have a massive impact on sleep quality and subsequently put you in a worse mood for enjoying the following day. One of the simplest insurance policies you can take is a roll of electric tape which you can use to cover the standby lights of any electronics, smoke alarms etc in your room and prevent these interrupting your sleep. I also recommend the app Pzizz to help you get to sleep. Not only does it drown out any unfamiliar noises but the specific music used (binaural beats) helps stimulate the brainwaves associated with sleep so gets you into a deeper sleep quicker.
This final point is perhaps the most neglected of all. You need to remember who you are going on holiday for. It isn't for your Instagram followers, it is for you. Prioritise accordingly! If you are behind a phone you aren't present in your situation which means you are missing the experience. Put the phone on airplane mode and make a deal with yourself that you can only use it for taking pictures. Avoid social media for the duration of your stay and you will reap the benefits. If this sounds petrifying then it is a massive red flag, cancel your holiday plans and book into some sort of silent meditation retreat instead.
Whilst this quick guide isn't meant to be a comprehensive travel resource it has hopefully given you some food for thought to help you get the most out of your trip. However you will still need to wear sunscreen and pack an adaptor.