You will do best running as training the same distance of the race you want to prepare for. The distance you run in training should be the same as race you are training for. If the race is a 5k you should run that every day. If it is a 10k you could run it every day if you have been running that distance every day, if not you should work up to it by adding from 10% of your distance a week. If it is a longer distance such as a half marathon you should run it at least once a week and maybe 7 miles 2 or 3 times a week and a 5k on the other days.
Great run today, it was only about 20 degrees so I wore some loose fitting running tights, a sweatshirt, windbreaker, gloves and stocking cap. I ran about 4 miles on city streets and then ran over to Kiwanis Park. It is a small park probably less that 5 miles across but it has a lot of wooded and grassy areas with rolling hills. Some hills are short and steep and some long and rolling. Running in the grass is harder than running on pavement but they have a nice blacktop path through the park. I usually run in the grass up and down the hills along the tree line.
I don't know why school track classes wear sweatpants and sweatshirts. The wind blows right through them and is very cold on bare skin. After you run for a while and get sweaty it is worse because the fabric absorbs the sweat becomes ice cold. This ice cold fabric then blows up against bare skin.
Never wear sweat pants and if you wear sweatshirts make sure to have a long sleeved t-shirt underneath and a vinyl windbreaker over it.