What helped me with Fretboard was the BEADGCF (Battle Ends And Down Goes Charles Father). Say it backwards and you get FCGDAEB. (Father Charles Goes Down And Ends Battle).
Same as Circle of 4ths /5ths, Order of sharps and flats - very handy.
But to get to my point about the notes on the fret board, in standard tuning, the notes also follow sequence BEADGCF. e.g. Ends And Down Goes is the note sequence EADG at the nut.
As long as you remember that whenever you get to Father (F), the note that follows on the next string is up one fret. Also whenever you cross from the 3rd to 2nd string , you move up a fret to find the next note.
Strings 6 and 1 are always the same note (different octaves).
I know that at fret 3, G is on string 6 and 1. So the notes go GCF (Goes Charles Father)
String 4 is an F note so move up a fret (fret 4) and down a string then start again with a B (Battle) on string 3 fret 4.
The next note crosses string 3 to string 2 so …
Move up a fret and down one string to get to the 5th fret and find notes EA (Ends And ) on strings 2 and 1 on fret5.
Fret 5 String 6 the note is A so I know notes go ADGC (And Down Goes Charles) then up a fret to 2nd string for F, (because we crossed from string 3 to string 2). So start again, but the last note was F so up a fret to fret 7 and B (Battle) on strings 1 and 6. Next notes ? EAD easy
Just remember to move up a fret whenever you reach F and whenever you cross the 3rd string to 2nd string.
A picture of the note layout is handy as you can see the BEADGCF flows occurring all over the neck much easier.
Special attention at fret 10. You have an F on string 3 and next note on string 2 (move up 2 frets not 1), one fret for the F and one fret for the string 3 to 2 changeover.
Edited as I got my string numbers confused. Just remember, Its up a fret at the G to B string change (on the 3 to 2 strings) due to tuning, and up a fret at Father.