diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 0109567..100514f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -24,3 +24,7 @@ Note that publishing changes or accepting any PR may take time. So please keep p
 ### Guidelines for first time contributors
 
 * https://github.com/Roshanjossey/first-contributions
+* Please refrain to work on multiple cards. As your friends and colleagues to attempt rest cards
+* Please claim the issue and clear your doubts before raising PR. So other users will not start working on the same issue.
+* Mention the issue number either in PR detail or in commit message.
+* Keep increasing the level of challenge.