setting up systems that help you to not get overly emotional about BTC price moves in one direction or another, even though we likely cannot completely take emotion out o f the equation, there are still ways to lessen the likelihood of high emotional levels.
I think from my experience that it is easier to take hold of your emotions when you still have good funds for yourself after taking care of your bitcoin investment and building your backup funds for the said period. When you must have created the kind of balance in your cashflow that you don't get strangled or disadvantaged by what is actually remaining for yourself, you can have the courage to look away from your holdings and manage your emotions well bearing in mind that there is no need tampering with your portfolio or getting troubled with the market dynamics as long as you have enough to keep you filled up presently and some good savings(not emergency funds) in case your cash at hand gets exhausted. Having a good financial backup increases the courage and confidence to act rightly.