Checklist for successThe Vikings' record through five games is perfect, but coach Mike Zimmer knows they can still play better. Here is a list of things Zimmer and his coaching staff want the team to improve upon over the season's final 11 games: Improve the running gameThe Vikings' 353 yards rushing and 2.5 yards per attempt are league lows. Nineteen teams average 4.0 yards per attempt or better, led by Buffalo's 5.6 yards per attempt. No more kicking gaffesBlair Walsh is tied for 23rd in the NFL in field-goal percentage (9-for-12) and 31st in point-after percentage (10-for-12). And let's not even talk about last season's playoff miss. Improve red zone defenseThe Vikings rank 22nd, surrendering a TD 64 percent of the time an opponent is in the red zone. However, the Vikings also rank first in NFL in giving up TDs, at just 1.4 per game. Improve third-down defenseThe Vikings already rank sixth in the league, allowing opponents a first down on 33.8 percent (23 of 68) of third-down plays. Still, Zimmer would like improvement. Play better in the first quarterThe Vikings rank 16th in first-quarter scoring (4.6 points per game) and 12th in first-quarter scoring defense (allowing 4.0 points per game).Sources: NFL.com and Teamrankings.com