Collateral
Brand collateral are a collection of media that are used to promote your brand. Easy examples are resumes, business cards, headshots, logos, etc. This topic can get a little tricky because you are faced with the core philosophical question: DIY or outsource. Just as you did when you explored topics focused on identity, be honest with yourself about what works within your skillset and time constraints.
Etsy
Since high school, I had a basic, black-and-white, questionably formatted resume that was neither striking nor impressive. Two years ago I purchased three resume templates for $10 each. Before you scoff at the idea of paying for a resume template, let me say the resume with an edge helped me land two jobs over the course of that time. Don't take my word for it. Sashay your way over to etsy.com and search 'resumes'. You might be pleasantly surprised.
Creative Market
Creative Market is exactly what it sounds like a - marketplace for creatives to showcase their work including photos, graphics, templates, typeface, really the list is endless. This is a great starting place if you are straddling the world between DIY and professional help. Depending on what you want, they have staged products that you can then go in and customize.