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For those raised on the 1928 Book of Common Prayer (USA), the following collect was said following the Kyrie at Holy Communion at every celebration of the Eucharist. It was jettisoned in the 1979 US revision, and for many it became "the lost collect".
I suggest putting it on a little card and carrying it with you to pray daily until you have learnt it by heart and it becomes a prayer of the heart:
O ALMIGHTY Lord, and everlasting God, vouchsafe, we beseech thee, to direct, sanctify, and govern, both our hearts and bodies, in the ways of thy laws, and in the works of thy commandments; that, through thy most mighty protection, both here and ever, we may be preserved in body and soul; through our Lord and Saviour Jesus Christ. Amen.