Always be on the lookout for new songs to learn and play. This is a helpful way to keep your mind in learning mode, and its advisable to try out a variety of styles to be a well rounded musician. At any given time you must have 3 types of pieces of grading difficulty. The time period to learn them should be 1 week, 4 week and 3 months.
Choose the time of day when you are most aware and alert to practice. This will improve productivity and you will get more out of your practice session. This also helps to avoid feeling like practicing is a chore.