There are a few ways you can keep your premium down. One is by paying using a different method. nib, for instance, offer you a 4 percent discount for paying directly from your bank account (as opposed to paying by credit card).
Or why not keep your premium down by paying your premium on a yearly basis before April 1, this way you’ll lock in your old rate for another 12 months. There are some health funds, like HIF for example who will even give you an additional 4% discount on top, just for paying yearly.
For many people though, paying yearly is not an option, so you may have to shop around to get a better deal.