I think conventional wisdom is to raise 2xBB UTG with a good hand. Opening the pot with a call is a no-no. Pump it or dump it.

What you wish you could do with AKo is raise 4x. Unfortunately since you're UTG, opening the pot with a 4x raise will push almost everyone out (except the hands that are beating you). Try a 2-3x raise instead.

The basic idea is to put people to difficult decisions. Limping makes it easy for the blinds to come in and opening with a call invites a family pot.
Conversely, raising big from UTG makes it easy for everyone to lay it down. They dont have anything invested. When it gets folded to the blinds, even the BB doesn't haev great odds to call garbage if it's heads up and he is now out of position.

One more quick thing is to never let your hand dictate your preflop raise. It lets other players put you on a range. Better is to alter your bet based on position.

-c