Avoid wearing tight stuff - sorry, thongs and skinny jeans will be your worst enemy! Let as much air get to you as you can - wear a skirt and go commando if you dare!
Cut out all sugar - not just the obvious stuff like sugar in tea/coffee, sweets and chocolate, but also fruit and alcohol
Avoid anything with yeast or that is fermented (bread, alcohol, Marmite, soy sauce, vinegar)
Avoid white pasta and rice
Avoid fungus - mushrooms are obvious, but also don't eat left over food. Even if it's been in the fridge there can be spores in it
If you're on the pill, consider coming off it.
And don't use anything fragranced to wash yourself as it can irritate.
As well as Canestan, you could also buy some Diflucan - or the Boots/Tesco equivalent. It's a one tablet dose. But make sure that your DH also treats himself with Canestan cream as you probably are passing it too and fro.
Sorry - it's a really awful thing to suffer from. I had it every month for almost 3 years before I finally got shot of it.