Perhaps its just me, but I've found Avon Skin-So-Soft to be innefective. I know there are people who swear by it, so I'm just relating my own experience.

Any spray, lotion, etc. with DEET probably works best. Citronella is good (but not great). Garlic also works...as does Vitamin B6 (which is also good for preventing hangovers....just in case you'd like to partake of an adult beverage or two while you're out amongst the little critters)!