[1]Watch a video and/or read guides before going through it.

Even an end-game entry dungeon like Wanderer's Palace could prove fatal in the face of players who doesnt know what to do

Be more aware, the time you spent learning can save you the frustration of going over and over a run.

[2]You are now eligible for it but that doesnt mean you are "good to go"

Your gears play a crucial part in terms of clearing a run so if you think/know that your barely getting that requirement, use your time more wisely by running more appropriate dungeons so you'll be more prepared for the higher ones.

In summary
-Its better to be overgeared than be undergeared
-Having to know what your getting yourself into is better than going in blindly

Hopefully this post raises awareness so all players can have an enjoyable and more successful runs