I too have a busy schedule but I pray whilst I am working or driving or doing chores.Even when I am at the cinema or something I manage to talk to Our Lord and pray.Try not to worry too much Our Lord knows the sincerity of your dear heart.He knows you are striving to pray as much as possible.Perhaps while travelling and doing chores you may be able to incorporate some prayers.God bless you
Memorare (Prayer to Our Lady)
Remember, O most gracious Virgin Mary, that never was it known that anyone who fled to your protection, implored your help, or sought your intercession, was left unaided.
Inspired by this confidence, I fly unto you, O Virgin of virgins, my Mother. To you do I come, before you I stand, sinful and sorrowful. O Mother of the Word Incarnate, despise not my petitions, but in your mercy, hear and answer me. Amen