Re: How to up your sex rank?
Grooming, good hygiene and dressing well (and appropriate for the circumstance) go a long way.
Grooming - Neat hair, well manicured hands. Shaving what needs shaving depending on what you are wearing (or plan to take off later).
Hygiene - Be clean. Wash your hair frequently (as needed for your hair type. I need to wash daily or mine looks greasy, my wife can go 2 or 3 days between washes if she doesn't work up a sweat). Bathe or shower daily and soap off 100% of your body(to remove body odors). Wear light fragrance sparingly, if you are clean, you don't need much. Trust me, a hint of a fragrance is much more seductive than dousing in it to cover up a body odor. Brush and floss and careful what you eat to control bad breath.
Dress right - Fit, fit, fit and fit. Do not stuff yourself like a sausage into the size you want to be. Buy what actually fits. If you carry extra pounds, find colors, patterns and shapes that flatter your features. If you don't have an eye for it, get some friends who do. Most girls love to shop for you with your money (goes for either sex). There are lots of women out there who enjoy playing this adult version of dress up. Save up some money and shop. Dress one step above what's required for the occasion (just 1 step, don't go to a fourth of July picnic in a tux!). If it calls for shorts and a T shirt, wear nice shorts and a polo (or a skirt and nice T shirt for the ladies). Be the best dressed person there, but not so overdressed you stand out. Keep up on fashion. You don't need to go full GQ (or whatever the female equal is), but don't look like you just stepped out of 1952 unless you are intentionally going for the retro look.
The 3 things take a little mindfulness of upcoming situations, but it ups your sex rank and you can go do it right now.