jmjZelie:Simply stated, a holy hour is an hour of prayer passed in the company of Jesus. It can take many different forms.
When made before the Blessed Sacrament, either exposed in the monstrance or reposed in the tabernacle, various devotions can be combined such as those listed in the original post. It can also be 60 minutes (or more or less) spent in the four ends of prayer: adoration, reparation, thanksgiving and supplication. Personally, I find it helpful to do the Stations of the Cross in the midst of the holy hour so that I am able to move a bit, as opposed to sitting or kneeling for 60 minutes straight.
One of the resources I came to really cherish when I first began making holy hours more than 30 years ago is a booklet written by the late John Cardinal Carberry, who was a wonderful and holy man. It is still published by the Daughters of Saint Paul and you might find it very helpful and I still return to it after all of these years. It is called “Reflections and Prayers for Visits With Our Eucharistic Lord.”
There are many resources available and a variety of approaches to making a holy hour. It is a matter of using the materials and methods that you find personally beneficial. I recommend reading Saint Peter Julian Eymard, who was an apostle of Eucharistic adoration in the 19th century.
Also, there is the devotion as practiced by Saint Gemma Galgani. It is especially helpful if you are not, for some reason, able to make a holy hour in the presence of the Blessed Sacrament. Her way is tied to the Agony of Our Lord in the Garden of Gethsemani and is beautiful and inspirational. You will find more information about her method here:
stgemmagalgani.com/2013/04/st-gemma-holy-hour-booklet.html