Help me beat my husband..at Magic!

HI!
I would suggest first of all to try to build playsets in your deck. ( 4 of many of your cards.)  Also, you need to decide what, specifically, you want your deck to do.  It looks like you might have cards for building counters on cards, so maybe start from there?  Thinking of only the cards you have,  increasing your living totems and crowned ceretok to 4 each.  Take out tireless missionaries - it's too expensive and the life gain wont help you win the game.
I would also take out most cards that cost 6 or more without any kind of mana ramp.. With a deck with mostly commons and uncommons, you need to try to get more bang for your buck when it comes to mana cost versus what the card can do.
Sedge scorpian is a fun one to keep -- a 1/1 deathtouch can be quite irritating to a much stronger card.. sure you lose the card when you defend, but your opponent loses his card to the graveyard as well. So far maybe try this?
4 sedge scorpion
4 sunblade elf
4 sungrace pegasus
4 crowned ceretok
4living totem
2 hornet queen
2 bow of nylea  ( there are those that would disagree with this.. but this card has helped me win a few!)

Add removal such as:
banishing light or pillar of light , and maybe druid's deliverance?

Or course, I don't know what is in your inventory, so I made these suggestions based on what I thought you might likely have.  Good luck, and I hope some of this helps at least a little!