Originally Posted by crosschk
I assume its half by weight?
Well, half is half, so it shouldn't really matter whether you split by weight or volume. I usually weigh because I think I can do things more accurately that way. One caution is that if you're getting kits with grains, you'll want to make sure each grain is separate. If they combine the grains first, you won't be able to get the proportions the same when you split.
What do you do with the other half? Will it keep in a lock n lock or something?
I don't know what a lock n lock is. I assume it's some sort of locking plastic container?
A lot of it depends on what you have.
If you have LME, you'll want to store that in a plastic or glass container (not metal). Cover tightly. If you're not going to use it within a few weeks, store it in the fridge. If you're in an area with high humidity, you may want to pour a thin layer of vodka on top to retard mold formation. The mold isn't harmful, but the idea of mold forming on the surface isn't really attractive.
DME can be stored in a plastic container, or even a baggie.
Grains should be stored in an airtight container. Crushed grains should be used within a few weeks if possible. If you're crushing them yourself, they'll last months.
Hops should be vacuum sealed if possible (even the handheld ziploc vacuum pump is better than nothing, but something like a seal-a-meal is best) and frozen.