Please do the first lab exercise before going through this list - different hints apply to each part, and you will only waste your time, and probably confuse yourself, looking through this list first. If you look at the online version of the lab script each part is linked to most relevant hint(s) for it.
Try to do each part of the exercise yourself, without referring to the hints, but if you get stuck you might find them useful.
Hints about individual parts of exercise 1:
General hints about regular expressions: