When first starting, I used to give a peek as soon as the cards where given to me. I was a noob live. Now that i have done it so much, I don't look until it's my turn for I play players now, not so much the cards anymore. It also allows me to use my head more on the action in front and what behind and when it's my turn, my cards will assist me in the decision verses making decisions based on my holdings if that makes sense.
My mentality on the poker table is look at position and look at my 8 other opponents and then when I look at my holdings, I then determine if my ammo "my holdings" is worth blasting if i can take them limps down or not. If it is big ammo, all my cards are going to do is see if i have the drop of an atomic bomb or a itty bitty firecracker.