I rarely if ever donkbet the flop anymore. I mostly just c/c or c/raise. What you simply have to do is unpolarize your range. Here are some hands from a session today.
This is against a 24 tabling (yes in 6-max) good regular. If he calls I probably have outs and backdoor draws are always a plus. I would always checkraise draws, a boat, a 10, random overs, and an overpair.

PokerStars No-Limit Hold'em, $4 BB (6 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

UTG ($400)
MP ($567.85)
CO ($250.40)
Button ($428)
SB ($629.70)
Hero ($438.50)

Preflop: Hero is BB with , .
3 folds, Button raises to $12, 1 fold, Hero calls $8.

Flop: ($26) , , (2 players)
Hero checks, Button bets $20, Hero raises to $64, Button folds

This one is against a good LAG player. I have backdoor draws. I also have a balanced range here.

PokerStars No-Limit Hold'em, $4 BB (5 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

MP ($110.80)
Button ($435.40)
SB ($835.40)
Hero ($406.70)
UTG ($400)

Preflop: Hero is BB with , .
2 folds, Button raises to $12, 1 fold, Hero calls $8.

Flop: ($26) , , (2 players)
Hero checks, Button bets $20, Hero raises to $64, Button folds

Guy here is a good TAG. I would be checkraising a huge part of my calling range preflop. Generally K high boards like this are good to craise.

PokerStars No-Limit Hold'em, $4 BB (5 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

UTG ($539.35)
MP ($501.50)
Button ($179.80)
Hero ($428.70)
BB ($449.50)

Preflop: Hero is SB with , .
UTG raises to $14, 2 folds, Hero calls $12, 1 fold.

Flop: ($32) , , (2 players)
Hero checks, UTG bets $22, Hero raises to $74, UTG folds