Sometimes I just feel that a chalkboard won't do. With only two items I can make a "chalkboard" of any size, with no chalk dust, and I can keep it forever. Sounds like a plan.
Foamboard + a paint marker. Both available at art supply stores or online.
I draw a general outline of each letter in pencil to get the alignment & letter sizes correct (not lopsided). This is especially necessary if you want to do an elaborate drawing like this one. No erasing mistakes with this chalkboard!
I made this one for an upcoming holiday party. Fun, right?! I think it's a great motto for the holiday season.