The Rosary
Benediction
Visit Jesus in the tabernacle
Chaplets
Novenas
Devotions to saints
An Our Father in honor of all the saints
Offer up your works, prayers, joys and sufferings to Jesus for the conversion of sinners, for the intentions of the Holy Father, etc.
Offer up Jesus’ Body, Blood, and Soul and Divinity in atonement, for the conversion of sinners, etc.
Grace before and after meals
Act of spiritual communion
Acts of faith, hope, and charity
Holy Hour of Reparation
Holy Hour of Mercy
Holy Hour of Adoration
Prayer for the intentions of the Holy Father
Reading the Sacred Scriptures
Contemplation, particularly on the Passion of Jesus Christ
Veneration of the relics of Jesus and the saints
Eucharistic procession
Eucharistic congress
There is much which non-Catholics can do that Catholics can also do

But let no soul do any pious act with the intention of not honoring God, for that angers the Father and saddens the Son and the Holy Spirit.