As people have already mentioned the problem with closing braces, I'll simply mention another technique I use to help prevent that problem. Whenever I open a brace (as with an if-statement), I close it right away (before inserting any code) and put a comment on the line with the closing brace - indicating which brace it is supposed to be close (helpful with nested if statements). For example:

if ($var < 0) {
    <do something>
    if ($var2 == 1) {
        <do something else>
    }#close second if
} elsif ($var == 0) {
    <do this other thing>
} else {
    <do something completely different>
}#close first if
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Its really a matter of preference, find something that works and stick with it. Keeping things indented and in line helps as well. Marking the closing braces can be used with for loops, code blocks or anything like that.