Here are just a few important points:
1) Spend time with the Lord every day, preferably first thing in the morning before the distractions of the day set in. You may pray, sing a hymn, muse on His Word, call on Him, etc. The main focus is to know Him, love Him and be filled with Him.
2) Read the Bible. Build a habit of reading every day, even if it's only one chapter. That way you can have a rich deposit of the Word. Having a reading companion is a good idea to make ourselves accountable.
3) Fellowship with other Christians. We have a life in us that is for the Body, and therefore necessitates fellowshipping with others for our own growth and the growth of the Body. Without fellowship, we can easily be discouraged and slow down or even stop in our pursuit of the Lord.
But you, beloved, building up yourselves upon your most holy faith, praying in the Holy Spirit ~ Jude 1:20