Nmap essential tips

-A	To enable OS and version detection, script scanning
-T4	For faster execution,prohibits the dynamic scan delay from exceeding 10 ms for TCP ports
-V	To see which engines are supported
-sS	Scan using TCP SYN scan
-sU	Scan UDP ports
-sn	Ping Scan - disable port scan
-p	Scan specified ports
-g/--source-port	Use given port number
-PS/PA/PU/PY[portlist]	TCP SYN/ACK, UDP or SCTP discovery to given ports
-PE/PP/PM	ICMP echo, timestamp, and netmask request discovery probes

Examples:

Intense Scan
nmap -T4 -A -v 10.10.10.63

Regular Scan
nmap 10.10.10.63

Quick scan
nmap -T4 -F 10.10.10.63

Intense Scan plus UDP 
nmap -sS -sU -T4 -A -v 10.10.10.63

Intense Scan with all TCP port
nmap -p 1-65535 -T4 -A -v 10.10.10.63

Comprehensive scan [Slow]
nmap -sS -sU -T4 -A -v -PE -PP -PS80,443 -PA3389 -PU40125 -PY -g 53 --script "default or (discovery and safe)" 10.10.10.63


Complete Reference https://nmap.org/book/man.html