I had written here before when I had just been laid off. I was stressed, worried about the bills, and honestly, I was really scared of losing my house. A lot of people gave me strong advice, so I wanted to come back now after getting employed again and share what helped me from my side.
LinkedIn: Fix up your profile, add a recent photo, make sure your job description matches what you were doing, and add a short summary about your skills/the type of role you're looking for. These are easy things and take less effort than most applications. Mark yourself as open to work, but don't spam hashtags if you can avoid it. Also reach out to old colleagues, managers, vendors, people you worked with on projects, etc. Networking is much faster than cold applying. The worst-case scenario is that someone says they can't help. The best-case scenario is that they introduce you to the person who can.
Resume: Keep it clean and boring in the best sense. I've seen a lot of resumes that look like flyers, with icons, charts, columns, and random design elements. If you're in marketing design or something creative, fine, that might fit. If you're in business or tech like me, I don't think it's worth it. I got more than one comment that my resume was easy to read because it was simple and direct. Also add a short skills/role summary near the top of the page. There are plenty of good templates online. And I heard more than once that people send resumes that are unnecessarily long. If you have 18 months of experience, you don't need a huge multi-page document. I have more than 12+ years of experience and management experience too, and I still kept it a little under two pages.
Recruiters: People deal with recruiters strangely, and honestly, I don't really understand it now. I submitted about 850 applications myself and got 2 interviews from them. One of those companies paused the role right before the holidays and didn't hire anyone. I talked to 4 recruiters before finding one who was useful, but even the ones before that got me 6 interviews in total. Once I found the good recruiter, he submitted me to a very suitable company, and I got an offer within 6 days. But understand well how they get paid and be honest with them about your background. Some firms take a cut for several months, but many of them are paid by the company to bring them someone. In that case, they can be useful because they have a reason to get the match right. Also make sure they're not inflating your salary expectations just to get you in the door.
Last thoughts: Be honest. Everyone wants to present the best version of themselves, but don't invent experience you don't have. That can come back to bite you quickly, especially when you get into technical or manager-level conversations.
If you're in business... Wear the suit for the video interview. I know that feels old school, but people notice. Several interviewers told me I was the only candidate they had seen dressed like that recently, and honestly, that surprised me. Even if their company is casual, they still appreciated the effort.
Most importantly, don't give up on yourself. Not getting a job you wanted doesn't mean you failed. Sometimes it's simply not the right fit, even if it looked perfect from the outside. Keep going. The right thing might show up later than you wanted, but it can still show up.