How do you prepare yourself to buy (open a position) or even buy some more when the market crashes or a stock has suffered a severe drawdown?

Is it something that comes with experience? This year I have been trying to only buy stocks that are down. I am trying to build the mentality to buy even when the market has crashed severely. I have been using the “saaspocalypse” as an opportunity to learn. Even though I technically bought the dip I am still a bit disappointed that I only bought when prices started to rise and when the price fell I didn’t buy more like I should have because I got scared. I wasn’t tempted to sell but I for sure was not in the mood to double down.