Once you have decided that you want a DJ to provide the music for your wedding reception, you have to pick the DJ. Picking the right DJ for your wedding can seem like a daunting task, because you know that the DJ sets the tone for the reception. Pick a great DJ, and it is going to be hard for your reception to be anything less than spectacular. Pick a so-so DJ, and even with the best food and venue, you are still probably only going to have a so-so reception. However, there are so many choices in DJs that you may be overwhelmed. Even if Limelight Entertainment is not your choice, we want you to be confident and knowledgeable when selecting your DJ, so here are our top 10 tips for picking your wedding DJ:

1. Don’t automatically go with someone you know. You may have a cousin, friend, or acquaintance who is a DJ, so you feel like you should choose them for your wedding. Maybe you should and maybe you should not; let their qualifications, not your relationship, be the determining factor. If you do choose to go with someone you know, don’t keep things casual- make sure that you are in a contract that specifically spells out your obligations and theirs!
2. Check with the venue. Does your venue have a preferred DJ? If so, that DJ probably knows the venues acoustics and any special concerns. You might not decide to go with that DJ, but their preferred DJ should be on your interview list.
3. Ask for referrals. That friend whose reception was awesome? Ask her for her DJ’s name.
4. Look at wedding forums for your area. Who do people recommend? Dig deeper than the star rating and actually read reviews to find out why people recommend a particular DJ.
5. Make a short-list of DJs and interview them. If a DJ won’t make time for an interview, how likely is he or she to make time for you during the wedding planning.
6. Check out their equipment. Ask questions- is it new and state-of-the-art?
7. Ask about their music library.
8. Make sure they can correctly pronounce all the names in the wedding party.
9. Do they let you know about other options, like uplighting, without making you feel like you are being pushed towards these options?
10. See how you feel about him or her. You are going to be spending a lot of time with your wedding vendors and a DJ is going to be a major part of your reception. If you do not feel immediately comfortable with a DJ, then you should probably keep looking! 

source: https://limelightentertainmentnj.com/wedding-dj/find-the-right-wedding-dj/