For me, the "I want to cook this" bookmark means: I want to cook this... someday. I made another bookmark for "Cook this month", which includes my menu planning for the current month. (This also helps my grocery shopping planning.) I currently have an additional bookmark for "Parents weekend", which includes all the recipes I am planning to make when my parents visit in July. Everything in the "Cook this month" & "Parents weekend" bookmarks is also bookmarked for "I want to cook this."
I also find it helpful display all the "I want to cook this" recipes, and then use relevant EYB filters or searches. -- So I type rhubarb in the search box, and then apply the "I want to cook this" bookmark. Or combine the "I want to cook this" bookmark with the filter for "Pies, tarts, & pastries", for example.