A technique I picked up from a Tony Kerns book is to write out a study plan over 6 months or 12 months of what to study. That way you have a target to aim for and it will cover FCOM, SOPs and any other manual you are required to know. I find the longer I am on the 1 type of aircraft and the older I get,the harder it is to pick up a manual so I need a written plan to force me to stay in the books