I am seen as too tight, how do I adjust / exploit?

[Mammux]

When I play live tournaments at my local card club, several of the more aggressive players have tagged me as too tight in the blinds. They steal my blinds with any two. What's my best approach for adjusting to or even exploiting this?

I have tried reraising (all-in if appropriate) whenever I have decent or great cards, but I'm not sure it's the best solution; it certainly increases my variance.

-Magnus