Question: what to do before 5k?
Answer: Get your z's two nights before. Pre-race jitters tend to strike the night before the race, interrupting your sleep. ... 
Keep it light. During race week, your running mileage should decrease. ... 
Fill the tank. On race morning, be sure to eat the breakfast you've practiced in training. ... 
Get there early. ... 
Warm it up. ... 
Get in line.