Add punctuation: Subscriptions to hundreds of magazines newsletters journals and ezines
A: Subscriptions to hundreds of magazines, newsletters, journals, and ezines.

Add punctuation: Located between Avenue George V and Montaigne a 2minute walk from the ChampsElyses Hotel Marignan is a design hotel in Pariss 8th district
A: Located between Avenue George V and Montaigne, a 2-minute walk from the Champs-Elysees, Hotel Marignan is a design hotel in Paris's 8th district.

Add punctuation: Exercising at least 3 times a week Hiking is particularly benificial in this context
A:
Exercising - at least 3 times a week. Hiking is particularly benificial in this context.