I'm having to commute daily for an internship this summer and have found that buying a season ticket has saved me a lot of money. Even with a 16-25 railcard, I would've been paying more buying separate tickets each day. It's a big lump sum at the start of the period you're getting the ticket for but it is cheaper overall.
Is there anything more than the student rail card to get cheaper fares if your commuting to uni everyday by train?
Depending on what time of day you travel and what the fare is, you might find that a 16-25 railcard doesn't say you anything at all. (This is due to the £12 minimum fare: