I've also read a tremendous amount about TRIM, SSDs, etc. Here's my very best advice: ignore everything you've read about SSD degradation. Just use your drive. Period. Don't worry about "filling it up". Under the absolute, worse case, fully degraded from constant random small-file writes, the write-speed will decrease to something in the neighborhood of twice as fast as your HDD. Under optimum conditions, the SSD is about 4-5 times as fast. So, who cares! And if you've read about the Intel, you'll know that a large, sequential write of a big file will RESTORE the SSD to as-new performance.
This whole TRIM debate is misunderstood by nearly everyone, and arises from highly technical benchmarks by reviewers, that just rejoiced in finding something to write about in the reviews of early SSDs. The firmware in all modern SSDs - including your Intel - have wear-leveling and garbage management built in. Hence, a large, sequential write will restore the drive.
Also, please note, degradation is WRITE PERFORMANCE ONLY, and even then, only small, random writes. READ PERFORMANCE does NOT degrade. And frankly, most of what you use an SSD/HDD for is READ performance. App opening, bootup, most of the snappiness of your computer is attributed to read performance, and even here, the latency and seek-time of the drive is more important than the overall sustained read speed as well. It's this decrease in seek time where SSDs really outperform traditional platters. So, just stop worrying about TRIM, degradation, and all that cr*p. Use the drive. Enjoy. Personally, I'd dump the on-board HDD permanently (and indeed, I did!). When/if you need substantial storage, use an external drive.
If you don't believe what I'm advising here, here's the very best article ever written on write-degradation on the Intel SSD drives.
http://www.anandtech.com/show/3618/intel-x25v-in-raid0-faster-than-x25m-g2-for-250/6
Please read this - the title is "Missing TRIM - does it matter?" Or, I can save you the time. The answer is NO. Here's the last sentence from the link, above: "The good news is that even if you bombard the X25-Vs with random writes, the drives can quickly recover as soon as they're hit with some sequential data."
This whole TRIM debate is just mind-numbing. In this case, honestly, ignorance IS bliss.