The Bible is full of words about sin and healing. You might like to think about these two passages:
'Praise the Lord, my soul; all my inmost being, praise his holy name. Praise the Lord, my soul, and forget not all his benefits—who forgives all your sins and heals all your diseases, who redeems your life from the pit and crowns you with love and compassion, who satisfies your desires with good things, so that your youth is renewed like the eagle’s.' (Psalm 103.1-5)
Are any among you suffering? They should pray. Are any cheerful? They should sing songs of praise. Are any among you sick? They should call for the elders of the church and have them pray over them, anointing them with oil in the name of the Lord. The prayer of faith will save the sick, and the Lord will raise them up; and anyone who has committed sins will be forgiven. Therefore, confess your sins to one another, and pray for one another, so that you may be healed. (James 5.13-16a)
You might also like to start (or resurrect?) a prayer diary. This needn't be complicated, just a small notebook with the names and circumstances of those for whom you are going to pray. Leave space to make amendments, and don't forget to jot down who has asked for the prayers.