Andrew Robson's Bridgecasts can not be recommended too highly. Every so often he comes away with a throw away comment, the best of which I will share here. Today's gem is when you have a choice of bids lean towards bidding at the bottom of the range rather than the top. Suppose you have a hand with 7 clubs and 10hcp. You could open this hand either 1♣ or 3♣. If you open 3♣ you are at the top of the range and your partner will pass more more often than not. You could easily miss a game, whereas if you open 1♣ then this is far less likely.

4441 hands in ACOL are always tricky, because they are most likely to make the rebid challenging. The recommend method is to use the TAPS system as in Hot (Hearts) and Cold (Clubs). So with a red suit singleton you open 1♣  and with a black suit singleton you open 1♥. In this hand South has a Red suit singleton and opens 1♣. The percentage chance of being dealt a 4441 hand is 3% although it feels more.