One thing you need as a day trader is to remove and eliminate any form of greed. And always check volume, once the volume is constantly dropping remove profit and wait for another entry point
Yeah, your suggestion is good and I think one of the keys to be a profitable day trader is to always practice. Once you do it often, your emotion would be controlled so that you would not trade base on emotions which is the number one problem of the traders why they cannot trade properly. Getting emotional while trading has a bigger risk of incurring a loss because when you are at a profit, you would become greedy and when you are at a loss, you would become hopeful.