Something that only gives like 1 or 2xp.

[Shaaaaun]

I want to have my XP to hit 3000000 its at 2999963 how can I get to 3M Exactly? Not I don't do Combat.

Something that gives 37 Exp.

I Did it!

1 Set of aarow shafts and Steal 2 Tea Cups.

 

[BeeStar]

Wind strike gives 5.5 exp when you fail it.
Wind rush gives 2.7 exp when you fail it.
Fletching arrow shafts gives 5 exp.

Therefore:

Fail 3 wind Strikes
Fletch 3 arrow shafts
Fail 2 wind rushes

 

[iBowi]

Why did you want exactly 3m?

 

[Mets Baseball]

That's actually pretty cool, I've always tried to get exact million marks whilst Runecrafting but that is really it.