Nice blog, complete with tutorials.

Some we know, some are funny and most of all some are useful.

Here's the link
http://caintechnews.wordpress.com/2009/04/22/64-things-every-geek-should-know/

That's a list of the content: Post how many of these you already know :)

1. The Meaning of Technical Acronyms
2. How to Reset RAM
3. Identify Keyloggers
4. Surf the Web Anonymously
5. Bypass a Computer Password on All Major Operating Systems
6. Find a Users IP Address on AIM
7. Hide a File Behind a JPEG
8. Crack a Wifi Password
9. Monitor Network Traffic
10. Recover Master Boot Record
11. Retrieve Data off Hard Drive
12. Load Rockbox onto an MP3 Player
13. Unbrick a Smartphone
14. Replace a Laptop Keyboard
15. Rip Streaming Videos
16. Strip Windows DRM
17. Homebrew Hack Game Systems
18. Find a Website IP Address Without Web/Command Prompt Access
19. Bypass School or Work Website Blocks
20. Screw with Wifi Leeches
21. Hexadecimal and Binary Number Systems
22. How to Hot Wire a Car
23. Increase Wifi Range
24. Carrying a Computer Cleaning Arsenal on Your USB Drive
25. Running an Operating System from a USB Thumb Drive
26. Understand What “There’s no Place Like 127.0.0.1″ Means
27. Read 1337 At Normal Speed
28. At Least One Fictional Language
29. How to Survive in a Linux Argument
30. Identify Major Constellations
31. Use a Camera in Manual Mode
32. Who Mulder and Scully Are
33. Javascript
34. How to Unlock an iPhone
35. How to Install Mac OS X on a PC
36. Build a PC
37. Tethering a Smartphone
38. Wiring a Home Theater System
39. Replacing a Laptop LCD
40. Make a Laptop Cooling Pad
41. Unleash a Laser Pointer’s full potential
42. Keyboard Shortcuts
43. Soldering Glasses Together
44. How to Execute a Shell Script
45. How to Hack a Pop Machine
46. Turn a Laptop into a Digital Picture Frame
47. How to Mod a Flash Drive Case
48. Do Cool Things to Altoids Tins
49. Convert Cassette Tapes to Digital Audio Files
50. Lock Your Computer with a USB Drive
51. Run Your Own Ethernet Line
52. Set Up a Streaming Media Server
53. Setting up a VPN
54. Turn Webcams into Security Cameras
55. Control Your House Lights with a Computer
56. Play Retro Games without Retro Consoles
57. Put LEDs Inside a Lightbulb
58. Create Music with Keyboard
59. Make Your Office Ergonomic
60. Adding a Third Monitor
61. How to Convert a DVD to x264 (or XviD or DivX)
62. Flash System BIOS
63. How to Irrecoverably Protect Data
64. The Fastest way to Kill a Computer