This from a post by MaG on an older thread, see if it helps:
Watch the lines and you will see if they overlap.
Take the crowded lines first and place them to one side first.
Then the least overlapped, and untangle those.
The more you extend them to the perimeter, it gives you more space at the centre to work on.
Concentrate on one or two lines close together first and don't get confused by the other bunched up ones.
Slowly work your bunched up then.
"Bleat, Watson -- unmitigated bleat!" ~ Sherlock Holmes