I'm going to go by an old FASA system that is based on skills from 0-100 (100 being the highest.)
0-10 Passing familiarty or basic instruction. (Basic high school equivalency).
11-20 Formal instruction or infrequent use of skill. (Advanced High School or other types of instruction.)
21-40 Advanced instruction and basic mastery. (College instruction, professional use or advanced personal training.)
41-60 Certified as holding an advanced degree, certification or governmental permit to perform this skill. (College BA)
61-80 Holds advanced degree, certification, or top level governmental permit. (Masters Degree)
81-95 Holds top level certification in chosen field. (PhD)
96-00 Recognized innovator in chosen field. Very rare.
That being said....I have...
Bluff - 20
Cooking - 15
Diplomacy - 18
Sense Motive - 20
Knowledge, Literature 20, History 31, Current Events/Politics 35, Science 14, Geek Trivia 32, US Law 13, Geography 17, Relgion 22
Motor Vehicle Operation - 50 (standard license with experience driving in mountainous, icy terrain)
Motor Vehicle Operation, Heavy - 25 (farm equipment)
Motor Vehicle Operation, ATVs - 32
Single Engine Aircraft - 5 (12 years of MS Flight Simulator will do that

)
Small Water Craft - 10
Firearms, Longrifle - 34
Firearms, Handguns - 25
Weapon, Knife - 20 (I'm pretty good at whipping around a butterfly knife)
Weapon, Longbow - 20 (Used to do some bow hunting in my youth)
Weapon, Crossbow - 20 (ditto)
Survival (Hunting/Fishing/Staying alive in the woods) - 23
Hand-to-hand combat - 14 (Don't hurt me!)
Languages, Common (heh) - 40
Languages, French - 3 (I know how to say, "Make the pig noise.")
Languages, German - 3 (I know enough to keep myself from getting shot.)
Languages, Klingon - 3 (I know enough to get myself shot.)
First Aid - 5 (I never miss an episode of ER)
Swimming - 13 (I can float and propel myself at a leisurely three knots)
Computer Diagnostics/Repair - 55 (Do this professionally with advanced training.)
Computer Language, Unix 18, VMS 21, Visual Basic 5
Electronics - 14
Gaming, RPGs - 40 (How do you go about getting certified???)
Gaming, Poker - 25
Soooooo....I might be a good guy to have around in a firefight and you need a computer repaired on the quick and dirty. But if we have to talk our way out a situation involving the Klingons, we are completely screwed.