1) Look for the type of inputs
Sometimes you’re overwhelmed with information and red herrings and you don’t know how to proceed. Look to your next lock/puzzle/obstacle to see what kind of information you need. Are you looking for a 4 digit number code? Are you looking for a 5 letter word? This gives you a good clue on where to look next.
2) Figure out what kind of room you’re in
There are different styles to escape rooms. Some places require you to turn everything in the room over . Some places have a very linear style of puzzles. The further you progress in a room, the more you understand about the style of room you’re in. Knowing what kind of room you’re in gives you a better idea if you’re stuck because you just haven’t solved the puzzle, or if you’re missing pieces entirely
3) Brute force the last digit
If you’re in a time crunch and working through a puzzle, it can be faster to just run through 10 digits on the last number. If it doesn’t work, it still reveals that something you assumed as correct was in fact not.