Heading to Track tomorrow

So, in talking it over with Justin - looks like we are headed to the track tomorrow. WAHOOO!!! (I sarcastically yell.) I have to do some work tonight to figure out what pace to run our 400's at tomorrow. My ideal goal would be to finish one of the two 5ks coming up in the 25 minute range. Last year I ran my one 5k at a 10:07 pace...so i need to shave 2 minutes per mile off of last year's time. I think I can do a 8:40ish pace now. So just need to try and nix that last 40 seconds.