It's good to plan for Lent. It's good to think about what you really need to work on spiritually. Are you lagging in your prayer life? Has it been a while since you've done any reading for your soul? Are you spending too much time away from your family due to a hobby or work?
Remember, Lent isn't about losing weight or simply trying to rid yourself of a bad habit. Lent is a call to convert (which is never a one time deal, but a lifelong quest for God), and conversion means that we stop in our tracks and assess where we are in relationship to where we want to be, and where God is calling us to be. Where we want to be (presumably) is in good standing with God, our souls bright, our will in union with His. Lent offers us the chance to check ourselves: are we on- or off-track? Where do we need to adjust? What needs to change? What do we need to add, and what do we need to get rid of?
Start thinking about Lent.
"May knowledge become clearer in us that we may know the breadth of God's blessings, the length of God's promises, the height of God's majesty, the depth of God's judgments." - attributed to St. Francis of Assisi