recommendations for learning the NOTES of the fretboard?

Hi everyone. Thanks for your capo recommendations. Today my challenge is to start to memorize the notes of the fretboard. Tab is nice, but I'd like to be able to read music that is not tabbed, and still be able to play. I think I'd feel like I'm increasing my musicanship by being able to do this.

Problem is...my memory is not like it used to be. Was wondering if anyone has any recommendations for learning the notes( to eventually be able to play a dulcimer tune with just by looking at the music.?)

At one dulcimer workshop I went to in N.C. I saw a person who had little stickers all over her fretboard with the corresponding note. It looked silly. But now I'm wonderfing if that would be a good tool. Any one ? Anyone know where to buy these stickers?

other recommendations>? Many thanks