How about starting a few plants from seed this year? It's really not as hard as you might think. Let me share a few tips that I've learned over the past few years.
Step 1: Choose your seeds. I realize this could be an entire blog post and I may write up something. What you need to know is: your growing zone and what you want to grow. I prefer growing Heirloom seeds (i.e. not genetically modified) because I can save seeds from this year's crop and grow them again next year, and eventually, it will be a zero-cost garden.
Most seed packages will tell you if you should direct sow or start indoors. Finding the last frost date for your area is a simple check of google. Count backwards the # of weeks indicated and then you'll know when to start your seeds indoors. Suffice to say, don't wait until May to decide to grow tomatoes from seed - there's just not enough warm season left to do this (well, it CAN be done, but it takes more work!)
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TIP: Leave one spot open in the middle - it'll be very helpful for watering later on. You can also leave a corner spot open. It's just easier to water this way vs. lifting the edge of the tray. (The growing tray is inserted into a sealed bottom tray to contain the water overflow.)
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TIP: Use old mini-blinds for plant markers. Just cut to fit inside the lids and mark with a sharpie.
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Step 3: As soon as the seeds sprout, REMOVE THE LID and water from the bottom only! Let the surface dry out. If you don't, damping off can occur. See above plant - the roots are literally growing above the soil line. There isn't much hope of saving plants when this has occurred. It's best to chuck them and start a new batch of seeds. Watering from the bottom will encourage plant roots to grow down. A lot of seed growers use oscillating fans to help keep the surface dry. Fans also strengthen the plant as it gets blown around (similar to outdoor conditions.)
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Step 4: Once the plant has it's leaves formed, it's time to get them under a grow light. You CAN grow in window light, but you'll have more spindly plants and you'll want to turn the trays daily to avoid the hard lean that develops.
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TIP: You can make your own grow station. I have this wire rack shelf I got from Target for around $35. It hold 6 flats on the 3 shelves with lights hooked to underneath shelf above via S-hooks and tiny chains. I can raise/lower the lights as needed. I set my lights to about 2" above the plants and move them up as needed. I purchased the lights from Walmart and have grow bulbs in them - not florescent bulbs.