I normally don't wear falsies to work, so I still rely on mascara for that. During the day I prefer a more natural, lush lash so I wear Maybelline Full N' Soft Mascara or bareMinerals Flawless Definition Volumizing Mascara. Neither leave me with clumpy, crunchy lashes or melt under my eye through the day. Both also come in waterproof formulas.
To deal with the sparseness (which at my lowest point was so severe I had a visible gap in my lashes where an entire section had been plucked out!), I use L'Oreal Lash Boosting Serum. Which is a more affordable, accessible product, like Latisse, that you can find at your local drugstore. And let me tell you, cupcakes... It made me into a believer! It helped refill that gap in about a week and all of my lashes looked fuller and longer with continued use. I should also mention that I had no strange side effects, like burning, tingling or irritation.
When it comes to false lashes my favorites are by Sonia Kashuk found at Target. I initially purchased one of those tong like things to help with application, but personally found it to be a bit cumbersome and instead chose to use my fingers. I apply all my makeup first, then tilt my head back (like I'm looking down my nose) and apply the falsie as close to my lash line as possible. What I found works best for me is to use a toothpick to apply the glue and wait a few moments for it to get a bit tacky before putting them on, otherwise they slide all over the place.
If you so choose, you can cut them in half and apply them to the mid to outer section of your lash line. This may work better for you if you have small eyes or want to bring the drama down a notch or so. I have not yet tried individual lashes, so I can't comment on those, but if I do I'll be sure to let you girls know my thoughts. One final tip to use with any lashes is invest in a " practice" pair to fool with for a couple of evenings before your big lash debut, the time and few extra dollars spent is definitely worth it.