When Mariah broke her nail really close to the "toe", I called the vet and I only wish my *old* vet gave me that advice instead of making me come in and charging me $100.00 for crap I could have bought at Wal-Mart for less than $10.00! She said a AFTER I paid "If it happens again, just put some flour on it and buy a wrap for her foot and check it often to make sure it doesnt get infected"! I was so pissed lmao! And besides her overpriced fee just for taking the dog in, this incident is the exact reason why she is my OLD vet lol!Oh smallfry, don't punish yourself too much - it happens!
Get a small bowl/container of warm water and pour a capful of liquid disinfectant (like Dettol - something that you'd use on a scraped knee) in it. Stand your doggy's foot in it for as long as he'll allow and pat it dry.
If he starts to lick it, that's ok, as dog saliva is disinfectant as well. You just need to watch out for incessant, obsessive licking and biting - he might end up doing himself more damage if he constantly fiddles with it.
Don't worry, dogs are resilient and he'll be fine - it's just like a human cutting their nails too close to the quick! My doggy snapped his dewclaw clean off once, because I forgot to trim it. It bled like hell and I felt terrible, but the advice I gave you above is exactly what my vet told me to do.