Piping "find" results through xargs

Piping the results of find using xargs doesn't typically work exactly how I want. If a file or folder has a space in its name xargs doesn't handle it correctly.
From the xargs man page:

Because Unix filenames can contain blanks and newlines, this default behaviour is often problematic filenames containing blanks and/or newlines are incorrectly processed by xargs. In these situations it is better to use the -0 option, which prevents such problems. When using this option you will need to ensure that the program which produces the input for xargs also uses a null character as a separator. If that program is GNU find for example, the -print0 option does this for you.

So, long story short: add "-print0" to find, and "-0" to xargs:

find . -name "*txt" -print0 | xargs -0 grep -i poisson

Using -exec instead of xargs

Using xargs to pipe results of find into grep has problems if find returns files/folders with spaces in the name.

find ./ -name "*html" | xargs grep "something"


Ends up giving me lots of "file doesn't exist" errors.

Using exec circumvents this problem, although using exec is apparently a less efficient way of doing things.

find ./ -name "*html" -exec grep -H "something" "{}" \;

-H tells grep to always show the filename, otherwise you only get the match.
"{}" represents the filename returned by find.
\; I'm not sure what this is, but it has to be there...

Update:
I describe a slightly simpler solution in this posting.