Personal OV Chipkaart Subscription – HERE. You can also link your card for direct debit and never have to stop and load your card anymore.
A subscription from GVB can expand your travel options with more discounts. Having a subscription can come in way cheaper and you can travel anywhere within your zone or any zone you choose rather than having the trip debited from your account for every trip you make.
There is the NS card too which you can get HERE.
You can also get anonymous card options for ease of transport especially if you have friends or family visiting
For NS deals, check the NS.nl website HERE