If there's dew you'll get condensation in any tent, even if it's just a tarp with the lower edges a couple of feet off the ground. The only way to avoid it is to camp where there won't be any dew - e.g. under trees. That however has its drawbacks, such as dripping after rain or sticky sap on the flysheet. If you are car camping you can also use a tent with a cotton flysheet that will absorb the condensation so it's not apparent.
Otherwise: a better ventilated tent helps, a bigger tent helps, keeping damp gear sealed away helps, a porch floor helps.
To find out how much water vapour you breathe out overnight, weigh yourself immediately before going to bed and again immediately after getting up (before going to the loo).