It's important to remember that the things on which you focus expand. That goes for areas such as wealth and abundance, good health and so on. And it relates to the attitude and perception you bring to your choices of behavior.
An awareness of the circumstances around you and sensing opportunities for chivalry will likewise deepen how much impact it has for you. Giving it a notch more attention will likely lead to a bit more frequency with ease, develop better habits and result in more times that someone notices what we're doing by offering it.
Furthermore, by increasing your awareness to notice opportunities you can be supportive and helpful in chivalrous ways will also strengthen your awareness of opportunities to be of service in ways beyond chivalry. That takes the practice of chivalry from a nice gesture into a state-of-being that can add to any gentleman's self esteem and the way he is perceived by others.
So make a pledge to take a quick pause every so often when you're on your way to or from work or heading out on a date and bring your awareness up. Watch how easy it gets.