Cut oversized blanks, they'll shrink a bit when drying, start with at least 1"x1"x6" or maybe a shade more -- I would do longer, like 12" or 18". Drying too fast from green will cause a lot of cracking/checking/warping -- depending on the wood. This tends to be worse on the end grain, you can paint the ends to slow the water loss and make the drying more even. You can wrap then cut blanks in a bundle with spacers and secure with a couple ratchet straps to limit the bending. Put in a warm/dry place with decent air flow - some people put them in the attic in the summer, or heat duct in the winter. Weigh a couple at the beginning and then check them every month or so, when they stop losing weight they are dry.
There are other faster methods, but most will increase the risk of cracking or checking. If you have plenty of extra wood, it usually isn't a problem to get a high percentage that is workable for penmaking. Microwave, food dehydrator, oven baking, denatured alcohol, boiling (releases moisture that is trapped cells and speeds up drying). The list of methods is as long as our collective imaginations -- even things like vacuum kilns or using silica gel desiccant.
Personally, I would cut blanks, air dry for about a month, and then throw in the food dehydrator for a couple days... Hopefully this gives you a little food for thought and help searching.