Can I keep a running list of people who can provide help with a service I need pretty often? 

Absolutely. Suppose what you need is rides around town. Sometimes you find that many people have active Offers for rides. Other times, it’s hard to find these Offers; perhaps they’ve expired. You can post your own Request for a ride, but you may not get responses in time to get you to that doctor’s appointment you just scheduled.

One thing you can do is ask anyone already giving you a ride if you can call on them again for this. But you can also post a Request for rides without specifying a specific place or a specific date. Just be clear that you’re asking to call or write to them periodically in the future. When people respond, ask them how best to reach them and what their likely availability is. So next time you have to schedule a doctor’s appointment, you can start by calling someone who is often available to give a ride at the time you need.

Suppose the service you need is hanging flyers for your garden club’s events. You may need several people at once, several times a year. If you’ve compiled a list of people who say they’re willing to hang flyers, you can bypass hOurworld and email them all at the same time. (Just make sure you BCC or blind carbon copy the group so their privacy is protected.)