You didn't indicate your interests, so this may or may not be helpful.
We were in Slovenia a June-July, 2015 and rented an apartment for a week in Bled. Lake Bohinj is about a 20 minute ride from Bled. I hiked up to Triglav, while my wife stayed in Bled. Here are some ideas to consider for day trips from Bohinj:
1- Doing the Bled island church, the Bled castle on top of the hill, and Vintgar Gorge is a full day option.
2- We did a day trip to Vogel ski center - took the tram ride, then hiked to Orlove Glave (moderate level) and had lunch at summit. After getting done with Vogel hike, we also drove over to Waterfall Slap Savice (531 steps to get to the water fall, so bring a bottle of water along).
3- Another day we drove to Trenta village. We wanted to see the Russian chapel, Vrsič pass, and Julian Alps. To get into Trenta village, there will be 52 road turns (so be ready to do a lot of gear shifting). In Trenta we stopped for lunch at Gostilna Metoja, with spectacular views of the mountains.
4- Planica Nordic Center is a world class winter ski jumping facility. When we were there in early July, the upcoming young jumpers were practicing, because the five ski jumps all have a carpet surface for year round activities. We also took a ride to Aljazev Dom, via Mojstrana. You can drive all the way up into the valley and have a good view of Triglav summit and the north wall experts climb.
I planned out my road maps before getting there, and followed GPS instructions, while also enjoying the beautiful sights of Slovenia. I assume that you are using RS travel book for Slovenia, it has lots of great details. We are going back there next year.