I like MRT6211's idea of journaling. I think that could help you a lot.

Since my T doesn't allow emailing (it's not her fault, though, as it's against office policy), I write letters to her and hand them over during session so she can read them. So I guess it's sort of like emailing.

When I create these letters, I use Microsoft Word and type out every single thing that pops into my head. (It's basically journaling, I guess, mixed with some brainstorming.) Then I review what I wrote and try to make things more succinct so that I'm not rambling too much. I also make sure the letter is no more than 2 pages, which is admittedly tough, but that's how I force myself to stay on track. (You don't have to keep it to 2 pages, though. Write however many pages you want. This is just my rule of thumb so that I have plenty of time to discuss the contents of the letter.)

I think ^that^ could help slow down the constant emailing if you're unhappy with the urge to email all the time. Well, you can still write emails instead of writing letters and handing them to her, as there is nothing wrong with emailing. But my point is that you can keep a journal for the week, edit it for brevity, then send it off. I also think that could help her keep track of things since IMO it's easy for things to get lost.