I took a really hot shower one night while he was sleeping. (He always takes his shower in the AM).
When I got out, the mirror was really steamed up. I took my finger and wrote "Wake up Daddy, I think I've got something to say to you". (For those that don't know, Rod Stewart has a song called Maggie May. There is a line that goes "Wake up Maggie, I think I've got something to say to you".)
Sooooooo, when he woke up in the morning and took a shower, the mirror was steamed up, but my words were there. lol. He had to wake me up and ask if that meant what he thought it did.
The second (big suprise) pregnancy, I just left the positive pregnancy test on the bathroom counter so he would see it when he went in there. lol.