If you're planning on applying for any kind of credit, revolving or installment, make sure you spread out your applications over a period of time. Don't apply for m multiple credit cards or loans all at once.
Instead, wait about six months between each new credit application. This will increase your chances of being approved and also prevent your credit score from taking a dip because of all the inquiries. When a lender checks your credit history to find out if you are worthy of new credit, this is known as a "hard inquiry" and can cause your score to temporarily drop.