Well I'm playing a mix of NL25 and NL50 doing really good in Pokerstars, and I was wondering the following:

In steal situations, where you have raised for example with Ax or K9+ from CO/BU/SB preflop and you get a flat call from either blind and hit top pair, of course you do your continuation bet always when heads up, but how does one react to donk bets on the flop with top pair bad kicker? And what to do against a check/raise?

Please take into account I don't have access to any type of stats while playing.