My resolution for this year is to not forget to smile and be able to allow myself enough emotional reserve to remain calm at all times.
ご質問ありがとうございます。
"My resolution for this year is to not forget to smile"=「私の今年の目標は笑顔を忘れないこと」
"and be able to allow myself enough emotional reserve to remain calm at all times."=「そして常に心穏やかでいられるよう感情的に余裕を持てるようになることです。」
ご参考までに。