I recently bout a wireless router and so I searched online for videos that gave a great explanation on how to set up the wireless router. The video above is pretty detailed to explaining how to set up the router. Below are a few others that might help along with some affordable routers to look for when shopping for a new router.

How to Install a Wireless Router
How to reset router password!
How to find router username/password
How To Configure Wireless Netgear Routers
How To Configure Router and WiFi Router Basics

Great Routers to look for when shopping for and comparing wireless routers:
Cisco-Linksys WRT54GL Wireless-G Broadband Router
Cisco-Linksys E4200 Dual-Band Wireless-N Router
ASUS Black Diamond Dual Band Wireless-N 600 Router (RT-N56U)
Linksys Maximum Performance Dual-Band N900 Router (E4200 v2)