I think by targeting specific companies is the best way to get a good corporate job. Brainstorm places you could picture yourself working at and contact them, send them your resume, see if they are hiring. Lots of big businesses may need help in your speciality, whether it is writing or marketing, or other, and relay to them what you can offer. Maybe they don't have an opening now and weren't looking but since you told them what you can do for their company - they may invite you onboard. Also, job fairs in a specific speciality - around here they have ones targeted for media such as radio and tv broadcasting job fairs. These are my tips- I'm in the same boat, and the popular Indeed.com gets old fast and doesn't have a whole lot of jobs within corporate agencies.