I used a few techniques on this for the watercolor - wet into wet, salt resist, stippling etc. then when dry I detailed it out w/ prismacolor pencils. Finally I sealed it w/ a fine matte finishing spray.
This started out as a sketch in my moleskine, I then cut the page out (eeek! I'm sure if there's any moleskine purists out there, they'd shudder hearing that - however I've learned that if I don't take my supplies too seriously I have the most fun and the BEST results so no problem here 'wrecking this journal' hehe!). To give it more stability for going through the mail and to write my greeting to Emila, I glued another moleskine page to the back, weighted it until flat and then for a nice clean finish, rounded the corners.