time to train

Having had good runs at the last three races, I've been having a look at my running to see what I can do to take it up another gear. I have had two winters of a lot of long slow distance work, with minimal speed work. Consequently my endurance is pretty good but I have no speed! While my goals are still dominated by the longer races, if I'm going to go any quicker I need to be a bit more structured! So its hill reps and speed work. It'll be trial and error. Coupled with this I need to work on my flexibility and core strength as its not what it should be, and my running 'style' is poor!