I use my Okidata laser printer,special paper and a heat press...

You can also use a decal that is printed with your printer - it is a hand wash only though. Check Belcal online - they show you how.

Has anyone used waterslide transfer paper to made the decals to put on tiles?

I put them on a coffee mug - just for looks - wouldn't take any washing...

Thanks I was curious about that, if it could be washed, I saw alot on coffee mugs and wondered how they washed them.
Is there a certain brand of decal paper that you use?

I was wanting to put a picture of my daughter's dog on a ceramic tile for her, she is crazy about that dog and it is getting old, thought she would like that. The dog is like a member of her family.

Use Krylon clear spray (matte would be good) - spray 5 -6 light coats letting it dry in between coats. You mich want to consider making her a mouse pad using the picture of her dog too - really easy to do...