Pill organizer. Start when you take just 1 once or twice a day, get used to filling it each week and checking on it until it becomes a routine. It'll keep you from double dosing and save fretting if you remembered to take your meds or not. Then when you're taking multiple pills multiple times a day you'll prep them 1/14th as often, and open<5% the bottles you would be. For a 1 time 3 dollar investment (you can find them with logos for free quite often) save yourself a few minutes a week, hours a year, days of your life.

A cheap digital kitchen scale, never fret with converting oz to grams again, just click the button and it's changed it's units, some even do liquid measurements so long as the liquid is similar density to water. And food cooks more consistently (therefore tastes better) if you use consistent ingredients, and how can you do that if you're using a "more or less" system? Get your accuracy to half a gram really cheap, a tenth of a gram (more than enough for cooking) for not much more.