This is just a comment on some changes to make you sound more colloquial with American English...if you are interested in that sort of thing. This is very good! This sentence is correct and very good, but to make it more 'english' and colloquial, instead of writing "...and after writing this note I will drink a cup of coffee or tea." I would say or write : ...after writing this note I'll drink a cup of coffee or maybe tea. OR '...after writing this note I'm going to drink some coffee or tea.' Also it's more colloquial to say: "Before going to bed I'm planning on working out." But your sentence is correct =)