Poker tells: Drawing Hand:

Poker Tells as Drawing Hand:
After a Flop checks Hole Cards : If a Flop with the possibility of giving a chance of straight draw or flush, then you should watch people those who are re-checking their own hole cards. They are checking whether the Black Ace is a club or spade. At this point Player doesn't have straight or flush,if they have then they would not have check, then it might be draw.
While calling a bet takes Long time: If player takes look at pot and seems to be calculating in his mind then probably he is. He will figure out the odds in pot if want's to try and can catch cards then he might be hurry in drawing hand.
An important note: players with large amount of experience will give false Poker tells, so the first and foremost thing is to read other poker players and notice whether they are pros or novices.