How do you crosspost?

I know quite a few of my lj-friends crosspost their blog psots from other sites to lj - is there a simple way to do that, aside from copy paste?

It would be useful since I now put my research on costume in a seperate blog, and I often forget to mention it here when I have written something.

Anway, latest:

A survey of Italian women's 14th century surcoats with split sides.

Headwear for women in Italy ca 1300-1350

7/8 length sleeves in - you guessed it: 14th century Italy.

I printed on an existing gown and it looks really good.