-learn something a couple nights a week with friends (shmiras halashon, mussar, parsha, shabbos material, etc)
-keep in touch with sem friends/teachers!!
-make sure to set enough time aside each morning to daven, and then make sure to say krias shema at night–this really helps keep me connected and focused at the beginning and end of each day
-keep a book of kabalos–trying to always do new things, and this helps me stay growing
-i recorded shiurim on an mp3 in sem, and listen to them all the time. i love this! 🙂
obviously, coming home from sem requires adjustments back into home life as well….these are some things that help me stay focused, still a few years out of sem. one of the most important things for me was staying busy: as long as i am constantly doing, being productive, that leaves much less time to waste and get into things i’d rather stay away from. the above list are “extras” that i implemented into my life for a ruchnius boost, but the main thing is to be busy, and maintain a focused and purposeful standard.