One More Step is a super easy, mental marvel using ordinary Uno cards. 
 
Effect:
 
Step 1 - Display the cards 
Step 2 - Mix the cards 
Step 3 - Spread the cards 
 
Even after all that mixing, you correctly predict that NONE of the colours would be together.
 
For the finale, you remove the prediction and it MATCHES the sequence of the cards EXACTLY!
 
Fully Examinable
Easy to Do
Instant Reset 
 
You will need to supply your own Uno cards and envelope, but once made, it will last you a lifetime. 
 
If you like this effect, check out Wild One, which is another trick using Uno cards.