I used to play MTT only and made several unnecessary all in errors when started to play cash game.
1. £1/2 live, HJ (LAG) raised £12, BU called, SB (Hero) reraised with QQ to £60, BB called, HJ reraised to £200, BU folded, I jammed with £350 stack. BB folded. HJ thought for a while and called my preflop shove with KK
2. £1/2 live, UTG limped, 6 players called. BB (hero) checked with 6s2s, flop is like 7sQs4s, I checked , UTG bet 50% pot, all others folded, I called. Turn is a brick, I checked, UTG bet 50% pot again and I jammed, and he snap called with A high flush