A buddy of mine who is a hacker told me about WPA / WPA2 hacking recently. So I'm sorta paranoid about my network.
Sometimes my network is slower from internet connectivity and I think it's WIFI hackers trying to get into my router.
Anyway to secure against Wifi hacking?

you can check your log to see if anybody is trying to connect to your router

Really paranoia? I think if you use WPA2 only, enable AES, disable TKIP and use a randomly generated 63 character key using strings from random.org I think you will be fine until WPA2 gets properly compromised.

No need to hide the SSID, it seems it has to transmit more data when hidden which 'in theory' makes it more hackable. When you hide the SSID it can be seen with the proper tools anyway, it just doesn't advertise itself. Also you *could* use a MAC address list but again that is only cosmetic, it takes 1 minute gather a MAC address from a valid client and use that instead.