I shave 2-3 times per week and used 1 blade for the past 7 months. Finally it got too dull and I put on a new one. Here's how to strop your razor and get maximum longevity out of your blades.
1. Shave like normal
2. When you're finished, rinse the blade thoroughly.
3. Grab a towel or cloth, spread it out a bit, and run your razor across it 10-12 times (opposite direction of the blade of course, to run it over "against the grain" as if you were shaving would cut and rip out the towel fibers).
4. Position one arm as if you were flexing your bicep. Place your razor at the base of your forearm and rub it upwards another 10-12 times (again, opposite direction of the blade, the normal way would cut yourself).
5. For even better results you can do this process before and after shaving. This takes an extra 30 seconds or so.
6. Your razor will remain sharp for about 7x longer.
7. I soak my blade in rubbing alcohol every few weeks.
Enjoy :D