Do more puzzles and analyze your games
How do you get your rating past the 1300 barrier?

Study up your openings up to about move 5 or 6. Maybe one or two variations off the mainline. Don't get overwhelmed. Review your games on chess.com and at the bottom of the analysis it will tell you want you need help on.... then use custom puzzles that address your weakness with your current rating range. Do about 50 puzzles and if you can get roughly 90% then you have improved that weakness.
How do you get your rating past the 1300 barrier?