Okay, here's Crazy Spatz's Ultra-Adjustable Skill-Modifying Feat! (tm)
Note: this is something the DM does, NOT the player. It's more of a Feat Construction Engine.
STEP 1> Pick one skill, or two related skills.
STEP 2> If you took one skill, pick two of the following. If you picked two skills, choose one of the following to apply to both skills.
a> If it's a cross-class skill, it becomes a class skill. Note that "all Knowledge skills", "all Craft skills", and "all Profession skills" count as one skill for this purpose.
b> If it's often used under duress, you now have the ability to Take 10 even while distracted.
c> A straight +2 bonus
d> "If you roll a 5 or less on this skill check, you may re-roll; the final result stands" which adds, on average, 1.875
e> If it's an exclusive skill, it becomes cross-class.
STEP 3> Pick a name.
On one skill:
A + C is called "Cosmopolitan" or "Educated"
B + D is what I use for "Skill Focus"
and so on.
On two-skill Feats, pick an appropriate name. Listen/Spot C is "Alertness", for example.
Then, there's the Greater Crazy Spatz's Ultra-Adjustable Skill-Modifying Feat! (tm), which lets you pick two more and adds more options:
f> if you took (b) before, you can also Take 20 even if failure has a consequence; it still takes 20 times as long, though
g> if you took (c) before, increase to +4
h> if you took (d) before, increase it to "If you roll a 10 or less"; this only adds 2.5 but greatly reduces the chance of failures on mid-range checks
And there you go. Insta-skillFeat.