Opening your range means opening with more hands than you have been. A basic MTT strategy advises keeping a very tight range at the beginning stages, and widening that range as the blinds go up.
Of course, you want to take as much as you can into consideration before raising. Dont just blindly raise lighter cause the blinds have gone up. If you have (a) tight player/s to your right then open up that range. Use a bet size that either commits you (intentionally) or lets you fold to a shove. Dont just raise and say "uhhh, he shoved.. What now?" if you see what I mean. But a generic play is not possible. It also comes down to, when the blinds go up, you have to play some hands, instigate some flips to win. If you just wait for good hands, A.) no one will challenge your raises and B.) you will probably blind out.