Ahhh... Well, will tho+se things need to+ be do+ne, regardless?
Because if so+, then yo+u may be better o+ff simply letting sleep take yo+u when it feels natural. The time will co+me and go+ at the same rate, regardless, but at least yo+u can be well rested in preparatio+n fo+r whatever it is that has yo+u so+ apprehensive.