Some verbs are of course simply very common in the English language and as has already been pointed out, in many cases an attempt to find a new word for every usage ends up sounding very contrived.
'Said' for example, must be used many thousands of times in novel (as in 'he said, she said, Dan said'
yet any attempt to write something different throughout a chapter reads - to me at least - as merely an overt attempt to jazz up the style.
Perhaps there are a set group of verbs and phrases that are 'OK' to include with regularity and I'd think that 'to look' is one of them. What is more interesting is the frequency of 'personal' phrases in writing, little sayings and favourite words that crop up
only in your particular prose.
WW has a phrase checker for submissions (and a word frequency checker) and it's quite terrifying.
On the particular case of 'laughing' I wonder if it's actually necessary to include this at all. If the joke or line is funny to the reader, it may not be necessary to show that the other characters also found it funny. It might even be more appropriate to point out when the
don't laugh. I'm currently re-reading Spike Milligan's war memoirs, which I find hilarious and the situations and lines he comes out with must have had his colleagues rolling around at times yet (and this is from memory) I don't recall Spike ever actually saying 'Harry laughed' or 'Devine laughed'. What he
does do is point out when one of his wise cracks gets no reaction (or an adverse one), usually from a senior officer.
If the lines aren't funny to the reader then it may be necessary to show that it is to the character - and explain why - but I would have thought this'd be a rare situation.
Jon
<Added>Please re-arrange the last sentence to make sense in your own time. (sigh)
J