I've made a point of trying not to talk too much about myself when I'm having a conversation with my friends.
この場合、次のような言い方ができますよ。
ーI've made a point of trying not to talk too much about myself when I'm having a conversation with my friends.
「友達と話す時、自分のことをあまり話しすぎないようにしている」
to make a point of ... で「努めて…する」
ご参考まで!