When spying on someone from a balcony, window or stair landing, use a mirror; put it at an angle where it shows what goes on below and you don't have to expose yourself to see it.
A code. Choose a word (with only one of each letter in it) and write it down; say, AGENT. Then write down the other letters of the alphabet. Underneath write all 26 letters normally. You've got a code.
When hiding, hide above or behind the pursuer and don't move at all, don't breath often, and make no noise whatsoever. The probability is they won't look up or behind.
If any, have two or maybe three guns; 1 on you 2 in your car if have one, 3 in the room you are staying, if 4 for specific uses. Keep loaded at all times.
Notes. Take them at all times - but don't do anything that looks suspicious.