Will add more to this list. Some of these articles, at the time of my reading of them, provided me extraordinary spiritual nourishment. Unfortunately, I don’t read as much now, and find it quite challenging to do so, my concentration levels aren’t great
Of course, I believe there is always more joy and fulfillment in growing spiritually with others, hence we can try to share the knowledge we learnt with a friend afterwards, or reading it together at the same time and discussing, or whatever, or sending one of these links to a friend whom you think might need it.

This list does not include lives of the saints as there are too many resources of those, which I constantly share on social media. Most of these are taken from pravmir.com and orthochristian.com
> The place of the lives of saints in the spiritual life
> The holy fathers on illness
> Who are the saints?
> That was from me – a spiritual testament of St Seraphim of Vyritsa
> How do we know God’s will?
> Every one of us is a potential saint
> The signs of a correct spiritual life
> The hardest and most important ascetic labour
> Love of money, the sin of distrust in God
> How to fight lustful thoughts?
> Why do Orthodox Christians need holy fathers? Isn’t the bible enough?
> Christ is our life (Metropolitan Athanasios of Limassol)
> Patient endurance is the fruit of virtue, and it is nourished by prayer (Metropolitan Athanasios of Limassol)
> We have to go to liturgy, even if we stand there like stumps (Metropolitan Athanasios of Limassol)
P.S. Any word transcribed or uttered from the pure and golden mouth of Metropolitan Athanasios of Limassol is profoundly spiritually nourishing.
On prayer
> Orthodox pastors on how we can learn to pray
> How to make your prayer fruitful?
> A prayer rule by St Theophan the Recluse
> Letters of St Theophan the recluse on prayer
> The Jesus Prayer by St Luke the Surgeon
> On absentmindedness during prayer by St Luke the Surgeon