No worries, I merged them. As for tips? Figure out what aspect of SEGA you enjoy the most and focus on it. That way, you can streamline your collecting and get things you truly want.
I have a pet peeve with collectors who aim to own it all, and blow their savings on everything and anything. Like, "oh, i want to own as many Dreamcast games as I can, never play them, and flaunt the pics online". Okay, so it's part jealousy on my part, but it's also just stupid to waste money on games you don't like and will never play. I don't own any of the Dreamcast 2K games because I'm simply not a sports fan. I've encountered numerous opportunities to buy them all at $2 each, but why spend $20 on a pile of sports titles when I could put that towards something like After Burner 32X or a rare SEGA CD game?
From 2004 until 2012 I almost exclusively focused on Dreamcast games, building my 20-something title collection to 150. Since then, I've shifted to Saturn and SEGA CD, getting most of the games I want to own. This year, Pico and 32X were my focus and I've collected all but 5 Pico titles and own every 32X game I'd wish to own. I've also focused on Master System quite a bit this year, buying only games I truly want and titles that are dirt cheap. Spending around $300 over 3-4 months, I've obtained 30 MS titles, a console, two controllers, and a lightgun. I've also restricted myself (and this goes for everything but Pico) to CIB. So if its cart or disc only, I pass unless it is an insane deal for a rare game. I want the disc/cart, case, cover art, and manual.
I made an exception to this for a cheap copy of After Burner which was missing the manual, and a copy of Last Blade 2 which was $5 disc only. I also believe I bought a disc only of Bangai-O for $5-$10.
Basically: Be smart, compare prices, have standards, and buy what you want - don't buy to fill a shelf.
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as for storage, try pull out bins or stuff like Ikea. They have a great bin system that fit inside these square shelves:
http://instagram.com/p/lSQ7fKL1F4/?modal=trueI keep all my MS, 32X, and NES games in them.