some trick with ls command

i use ls command very frequently, and here are some tricks
1. list only directory:

• ls -l | grep “^d”
• find . -type d -maxdepth 1 -mindepth 1
• ls -d */

2. list only file

• find . -type f -maxdepth 1
• find . -type f -maxdepth 1 \( ! -iname ".*" \)