If a player’s chips are stacked in a mess then this often means they are an aggressive player that plays fairly loose. Also, the opposite is true for a player that stacks chips in an organised fashion – this often means they are quite a tight player.
If your opponent reluctantly calls let’s say with a sigh or a shrug or with a shake of the head, then they will often be holding a strong hand.
If you see another player at the table look at their hole cards again after the flop, they are usually checking the suit on their cards for flush potential. This would indicate that their cards are not of the same suit, but they may have a flush draw on board.
Players with lots of small denominations of chips shows a player that has stolen a lot of blinds.
A player that bets £10 with ten £1 chips is less confident of their hand winning than a player that bets with one £10 chip. This is however a well known tell and more experienced players will deliberately bet this way to infer weakness. I know I do it!
Sometimes, a player will break a large chip down into smaller change before they really need to. This is often the signal of a tight poker player.