I read once that we should always pray to Our Lady just before we receive Communion at Mass. It is the perfect time to ask her to intercede for us and help us to receive Our Lord well. Afterall, she was the only human who received Jesus in the Eucharist perfectly. Who better to ask?
For this reason, a priest suggested keeping a holy card of Mary in your missal just before Communion to remind us to ask her for this special grace. What a wonderful idea!