I cowash once per week, usually on Wednesdays. I use a cheapie conditioner, like Suave or V05. Here's my process:
-I wet my hair under the shower stream, then squeeze a liberal amount of the conditioner into my hair. I massage it in (almost like I was lathering a shampoo) and cover with a plastic cap.
-Then, I take a few minutes to wash my face, body, shave, etc. I let the conditioner sit like this to help loosen up any gunk I may have on the hair strands.
-After a couple of minutes, I remove the cap and rinse out the conditioner, using a shower comb to detangle.
-Next, I squeeze out the excess water and add my leave-in and oil.
-I twist my hair into a little bun, pin it up, or throw in a couple of flexirods so I can airdry. I may also add a little gel or Beyond the Zone Stiff Head to my edges before I tie it all down with a satin scarf.
My hair isn't all that long though, so those with longer hair may have different methods. Also, I found that cowashing was leaving my hair a little on the mushy side, so I just started a modified version (I saw it in KiniKakes' Fotki). I'm going to start using hair mayonnaise (Africa's Best) as a "pre-treatment" for about 15-30 min. before I cowash. This will act as a mild-moderate protein treatment, and help keep my hair from becoming over-moisturized by the cowashing process. I'm discovering that my hair likes protein.