The 90 Club
The Vivicittá half-marathon will be held on next Sunday. It's going to be interesting since I didn't have much time to run lately. However, I spend an hour every day riding the bike to work, more than 20km a day. Apples and oranges, of course, but it may help with endurance.
And because there has to be a goal, let it be in writing. The next step would be gaining membership in The 90 Club, which requires a sub-90 minute half-marathon. Last year my time was 1:44' and last autumn at another competition I was timed at 1:40'. Ten minutes is a lot, so it probably won't happen anyway.