Of another sketchbook.
Unusually, I've been using a lot of coloured pencils recently. Maybe because they give me the flexibility of graphite but without the option to rub out errors, as with ink.
Next, I am moving out of my normal comfort zone and not starting another Daler Ebony A5, but the A5 Stillman & Birn I got given at last year's Urban Sketchers' Symposium. I'll let you know how I get on.