I love how CTMH has brought out some exclusive Aussie only stamps (oh, and there are NZ ones too if you are interested!). I have used the Australian Thanks set here very simply coloured in using a water brush and pens. VERY easy to make it look good using this method!
I used the Happy Birthday sentiment from the Joyful Birthday set which has some fantastic Happy Birthday fonts that suit so many different cards.
And oh, clear stamps how we have missed you! So simple to stamp on the sentiment directly on to the base card and not have to worry about it being crooked, in the wrong place, or falling off the clear block. The CTMH stamps make such a clear, crisp image that it is no problem to just stamp straight on to the card!