Things like games, cards, or printable manipulatives that are part of the center will last longer when they are laminated, and you won't have to prep them again and again. You'll want to be sure you don't have anything in the wrong place, or you might have trouble sorting it out afterward.
Sort the pages into piles by activity.Investigate the HP Instant Ink program and use this link to receive a free month of printing! Printing on colored paper is a good alternative. Color activities are more appealing and exciting for students. I also recommend printing in color if you're able. The heavier paper will help the pieces stand up to repeated use.
I recommend using cardstock, if possible.