Since I run the 800,400, and the 1600, should I use spikes,and if so,where do I put them on my shoe?

spikkes add grip,so you shouldnt need them unless in wet conditon in which case spikes go at the heel and neaar the ffront

No, wear spikes! Honestly! I wore spikes in a race and I knocked off 3 seconds off my Pb which was from a week ago! The dude above obviously doesn't know running very well. Spikes do help in Wet conditions but that is not their main purpose. They are for speed as the shoes are light weight. And much lighter than regular trainers! for 1600 you should get 6MM Spikes and then get 4MM for The 800M and 400M. You get a special screw hammer, It screws on the spikes for you. It should be included in the pack of spikes you bought along with your spikes trainers. If they aren't you'll have to buy them separately! Good luck in your race!