I have all the prayers of the rosary https://www.vatican.va/special/rosary/documents/misteri_en.html#How_to_pray_the_Rosary and various other chaplets and similar prayer rules using beads/knotted rope as tools. I have a lot of prayers that were written by saints memorized. I am not very big on memorizing scripture to any sort of exactness but rather try to read it very frequently so that I’m more and more familiar with it overall I definitely have parts that I favor though haha 

I said this prayer multiple times a day everyday for awhile and it got me through some really hard times and it’s short so not too difficult to memorize:

Grant mercy, O Lord, to them that hate me, or oppose me, or wrong me, or slander me, so that none of them may suffer any evil in any way - whether in this present age or in the age to come - on account me, an unclean sinner. Cleanse them instead by thy mercy and protect them, O Good One, by thy grace. Amen.

I am working on memorizing this currently https://www.akathists.com/the-most-holy-theotokos/joy-of-all-who-sorrow/

And all the prayers of the Divine Liturgy!