O...october 15... know someone with a birthday then?
Orchard with 15 fruit tress (you don't have to name 15 different fruit trees just get the principle of it)

Ocean liner 15 cm long (yes it's in a bottle)

Pound... 16 ounces = 1 pound
Pint - 16 ounces = 1 pint

Quill - a 17cm one just manages to tickle my nose.

I'll let other post some suggestions too.

Sometimes it's easier to adapt to someones idea rather than changing them.

The anchorman list is useful for memorisin the numerical order of the alphabet... how you do it doens't matter provided you give yourself enough cues... for me S is almost always forgotten I check T and remember it's one behind.. so I know it's 19 in the list. For me tennis is fine but just think of a word and see if you can associate a number with it eg toes... could work... 20 digits on the body if I count the toes.

Some of the other ideas are easier to work into the memory web than trying to find different once.

So far do you leap? Only as far as you have to to give yourself the numerical sequence of the alphabet.

Alex