Figure out the purpose of the vacation
Resolve whether the purpose of your trip is to explore or sort out the friction in your relationship. Once the trip goals are identified, it will make for a more agreeable planning of your daily agendas.
Prepare a list of who will bring what
Once you have decided you are travelling together, determine who's bringing what. No one wants to spend their first night in a new place searching for forgotten toiletries or devices charger. Make a list with your partner and check it several times.
Discard your phone when you can
Even when you are not travelling, mobile phones are a major cause of distraction. Try to resist the temptation of checking your phone every minute when you are with your lover. If this is the case, you won't achieve the purpose of your trip no matter what it may be.
Decide on a budget and who will pay for what
Money is hard for some people, but it's worth it to ensure that one partner doesn't feel like they're constantly paying for everything. So, endeavour to plan a budget, conclude on who will pay for what and stick to your decisions.
Schedule a few events or reservations in advance
Nothing is worse than rolling into a new city and not being able to decide what to do, see, or eat. Plan at least one meal and one activity a day to ease up on scrambling for last-minute options.