If you can afford it get a dehumidifier. You can get them from abot £60 if you shop about! They work by pulling the dampness out of the air and it is surprising how much water you get out of them! Other things you can do are: open windows as soon as youve been bathed or showered; Don't dry washing on radiator if you can hang it outside; Cook with the window open! These are all actions that create steam which condenses onto cold walls and windows!
After a shower I use a squeegee on the panels & tiles so the water goes down the plughole rather than sits on the wall - this also helps reduce the occurrence of lime-scale. Also if having a bath put the cold water in first - this reduces the amount of steam from the hot water. When cooking use lids on pans at cook at a lower teperature. Use a stacking steamer for veg so that you're only using one pan instead of several.