Are there any technique or tips for remix of songs?

1. Pick the Right Song
2. Listen for the Gaps
3. Form a Game Plan
4. Listen to Other Remixes
5. Cut and Choose Your Material (Bootlegs)
6. Work WITH the Material
7. Arrangement ASAP
8. Feature Parts from the Artist’s Other Songs
9. Keep it Similar
10. Use Parts of the Original Track
11. Process and Mangle Stems
12. Treat it as an Original
13. Create Your Own Melody
14. Collaborate
15. Keep the Original Breakdown
16. Use What’s Needed
17. Train Your Ears
18. Create and Add a Musical Signature
19. Add a Second Hook
20. Make an Alternative Mix
21. Ask for a Deadline

The following website have detailed elebration of the steps given above. Hope it helps!!!
http://edmprod.com/21-remix-tips/