I've only received stake once since receiving my initial coins. I think it stakes once a month, but I'm not 100% on that.
Nope, I meant to make an announcement about this;
Coin age begins after 1 hour and max age is 8 hours.
This means if you don't leave your wallet open and stake at least 3 times a day (contributing to network integrity), you are missing out on staking rewards. How's that for rewarding contributors?
The wallet automatically minimizes to the tray so it shouldn't get in your way if you leave it open while your computer is on.
Unfortunately those pesky PoW blocks are getting in the way.
That's a pretty clever way of making sure you are being rewarded for your contributions to network integrity, but I'm kicking myself for not realising this and not having my wallet open as soon as I boot my PC.