As the blinds go up, there will be a mix of chip stacks at the tables. Some players will already be in the danger-zone, others will be comfortable (though not yet in a position to win), and still others might have a big stack like you.
With antes in play, stealing your fair share of the pots pre-flop becomes an objective.
If another player with a decent sized stack enters the pot, you need to limit what cards will get you to call. Before you decide to call light, make sure that losing a pot against this player would not stop you from dominating the mid-sized stacks around the table.
At this point in the game you need to be wary of accidentally committing yourself to a pot against a smaller stack. If someone with a small stack raises and you 3-bet, the pot might be so big that you have the odds to call with any reasonable hand post-flop – even though you will lose more often than not. Mid-sized stacks are the best targets. These players will be reluctant to play big pots without a monster hand. They have enough chips to wait for a better spot.
Try attacking limped pots and continuing to isolate the weakest / most straight-forward players. Beware of small stacks still to act in these spots. You could isolate a fish, only to find a shove all-in from someone with 10 to 15 big blinds.
Whatever the dynamic of your table, it is vital that your play focuses on accumulating more chips. It only takes a couple of other players to double up, and your big chip stack is not so far ahead any more.