You get 50 PC points per check-in to an IHG hotel, limit one per day. So in one year, if you check-in every day, you will receive 18,250 points. Or 18,300 in a leap year!
How to check in?
Sign up at TopGuest.
This can be done through Facebook, but for me it's best to sign up to FourSquare, which is a social network that allows you to check-in to businesses/places across the world.
Once you have your FourSquare account, link it TopGuest.
Then, if you have a GPS-capable phone you can download the FourSquare app for your device, or access the mobile site. Then you simply find your nearest IHG hotel and check-in. You can search for hotels slightly outside of your area. Within an hour or so, the TopGuest site should show you have 50 points. Simple.
If you prefer, you can check-in from your computer. I use FireFox, which does automatically find where you are. But if it doesn't work you need to use the GeoLocator add-on to manually find where you are. Once you've installed the add-on, go to Tools -- Geolocator -- Manage. Click the Green + sign at the top right. Tell it where you are, then click the second button at the top - next to the Green + sign, which says 'Switch from Select to search geolocation'. Then simply double check the details, and click the third button, the Green Tick. Confirm you want to use that as your location and then that's it. Just rinse and repeat when you move location. (Using these steps, will also allow you to manually find a location for Facebook, you just need to visit the iOS optimised website and then check-in to places. If using Gowalla, you need to visit the mobile check-in website)
Once this has been setup, go to the FourSquare mobile site. Then search for a venue. Find your nearest IHG hotel, then check-in!