Zetero

Better BibTeX is a great tool to export BibTeX-files from Zetero. A tip to get even cleaner BibTeX-files is to add the following postscript code.

if (Translator.BetterBibTeX) {
    if (reference.has.abstract) {
        reference.remove('abstract');
    }
    if (reference.has.note) {
        reference.remove('note');
    }
    if (reference.has.month) {
        reference.remove('month');
    }
    if (reference.has.keywords) {
        reference.remove('keywords');
    }
    if (reference.has.file) {
        reference.remove('file');
    }
    if (item.arXiv.id) {
        reference.add({name: 'arxivid', value: item.arXiv.id});
        if (!reference.has.journal) {
            reference.add({
                name: 'journal',
                bibtex: `{arXiv preprint: ${item.arXiv.id}}`
            });
        }
    }
}