points (rewards)

I collect them.

私は貯めます

I collect the reward points.

私は特典分を貯めます

I collect the reward points with my membership card.

私は会員証を使って特典分を貯めます

I collect the reward points with my membership card at the convenience store.

私は便利店で会員証を使って特典分を貯めます

I collect the reward points with my membership card at the convenience store on my way to work.

私は出勤途中に便利店で会員証を使って特典分を貯めます