One thing at early levels that stinks is that you have limited resources. Spending them on your familiar can be risky. One way I mitigated this with a wizard PC I made was to give her the Cypher Magic feat at first level. Then I gave the familiar the Familiar Focus feat. This meant that any harmless spell I cast on my familiar from a scroll, like say Mage Armor, received a +2 Caster Level boost.
Also if you're looking to up the combat power of your familiar there are a couple 1pt Evolutions you can pick up with Evolved Familiar that can enhance damage, grant longer reach or give your little buddy extra attacks. Imagine that battle goat with it's gore attack plus a pair of hoof attacks, a bite attack, enlarged to Medium size and having the gore raised to 1d8 damage dice. Slap some armor on that bad boy, load it up with mutagen and start mauling!