JeremysITLab free course on Youtube
Keith Barker's Quizzes on Youtube
Subnetting practice
70+ hours playing with Packet Tracer
JeremysITLab practice exams
Wireshark to look at packet captures
Anki flashcards to remember all those acronyms
r/ccna
CCNA OCG by Wendell Odom (for very specific explanations)
GNS3
CCNP Encor OCG by Brad Edgeworth
Anki flashcards to remember even more acronyms
