1. Stop spiritual practices that don't work for you. The Rosary is a lovely, wonderful meditation. It doesn't work for everyone. Lectio Divina is awesome - if it helps you develop spiritually. Listening to Gregorian chant - uplifting! But not for everybody. If you've been struggling to do something because you think you SHOULD, but it doesn't work for your life-style, personality, spiritual life...then stop. Do what works.
2. Stop putting off the Sacrament of Confession. Make it a regular part of your life. Regular. As in, at least once a month.
3. Stop zoning out at Mass. The new translation seems to be helping us be attentive, but we all have the tendency to "zone out" during the Mass. Really practice being attentive - get a missal, follow along. Work hard at praying the liturgy.
4. Stop being judgmental of others' spiritual practices. Angry that your sister hasn't been to Mass in months? Pray for her. Can't get over the fact that your son married a Lutheran girl? Pray for them. That lady in front of you at Mass that hauls out all the toys for her kid to play with during the liturgy? Pray for her. When you catch yourself having a judgmental thought, pray for the person instead. And then pray for humility for yourself.
5. Stop letting yourself off the hook. It is so easy to say, "Oh, I'm a good person. I go to Mass every week" or "Hey, I pray more than most people". It's still not enough. Having an active, holy spiritual life is rigorous - you can't "let up". You're training for the Eternal Olympics, and you want the gold! When you catch yourself slipping, it's time to dig a little deeper, pray a little harder, ponder Christ on the Cross a bit longer. Don't allow yourself to think "good enough" when it comes to being a Christian. You can rest when you get to Heaven.