Tighten up and open raise only if you willing to call his thing.
Call with good
hands like for example AJs, 1010 or even lighter but only if you know that it's a heads up and no one else will get involved.
Many times I'm thinking that I 'm a decent player and that I'll have many fair chances to win later and so I don't want to get busted for 120bb with a somewhat marginal holding, when playing for that amount of big blinds, like AJ or 1010 that I would never call against an unknown player.
But then again luck always takes its part even if we hold AA, and if the opportunity arises I 'll make the allin call light against an 100% shove range and good luck to his Q3o xD.
Sometimes we will lose but the point is to make right and reasonable decisions.
It is good to adapt in various situations and to not follow the tendencies of the bad players.
At the micros many players do all the crazy stuff, like shoving any two or all the table limps in and call everything. Keep calm and keep playing your game with a little adaptation. At such situations is not bad in my opinion to limp some hands too in position (I mean limp after all the table is in, never open limp and just raise if you have one limper) or call crazy shoves deep with a wider range.
These situations happen only at the micros and since adapting plays a great role in general this is why I'm suggesting such things xD. Don't take me wrong.