Okay, I'll play!
1) Get ALL your inputs mixed and sounding as-best-to-taste BEFORE going into the recorder, using all the EQ necessary and all requisite mic positioning, and even efx like reverb/compression as such,... if that floats your boat,... tho' for the record (heh: pun) I'm not into effects, per se, and I go au'naturale for the most part when recording. EQ I'll use. I'll step up and say that in my world, the concept of "record it flat as possible and tweak it in post" is utter shite.
2) AFTER you get your input-side sounds tweaked JUST RIGHT, add JUST A HAIR of high-EQ on top of it,... to compensate for the natural rolloff you'll get with analog tape. Trust me on this one.
3) MIC TECHNIQUE: maybe this is not analog recording specific, but when singing and doing vocals,... back the f@ck up, off the mic! Don't "eat" the mic. Don't fight with proximity effect and plosives. GIVE YOURSELF AT LEAST 12" MIC DISTANCE AND COMPENSATE WITH GAIN ON THE PREAMP, AND FOR GOD'S SAKE, JUST SING-OUT. I'm more likely than not to give myself AN ARM'S LENGTH MIC DISTANCE when recording vocals. SING OUT, the energy you get with this technique will be noticeable. SURE, there's stylistic points where it's good to "quiet down and come close" to the mic, or alternatively when you can't really hit a particular note with power, but for the most part, I'm an arm's length from the mic. Sure,... it picks up more room ambience,... and I'm also not of the mind set that that's entirely a "bad" thing.
4) Electric Guitar/Bass: also not analog specific,... when doing a DI feed from an electric guitar and bass, I'll ALWAYS mix in a close-mic on the body of the guitar, specifically to pick up the pick snap, string buzz and natural ambience of the guitar's strings in an acoustical sense. It really opens up the guitar/bass sound, makes it sound more natural, electric fuzz guitar track or not withstanding,... and it's a technique I swear by. This also implies you have a front-end mixer that can mix or buss two or more sources together down to one track. HELLO OLD SCHOOL ANALOG HAS ALL OF THAT CAPABLILITY BUILT IN AND IT WAS A NATURAL PART OF THE GAME. Nowadays you have to "harken" the digital guys back to old school techniques, sometimes for their own good. Analog had track count limitations, and bussing signals was often the rule of the road. We didn't have the choice of recording little minute tracks of ambient sounds to separate tracks and mixing them together in post. It was all done on the input side. Reality check. For the most part, myself being analog, it still is. I'm of the mind set that with an electric guitar, distortion pedal, 2 cables and 1 microphone, using the mixer and EQ onboard, I can dial in ANY guitar sound I want. ANY. From "acoustic" to "fuzztone", (for lack of a better word). No amps necessary!
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I can't pull any links for ya right now, but if you wonder that I put my money where my mouth is, hit my signature link down below and scroll thru the music posts till you find "Moonage Daydream" or "Rock and Roll Suicide", to name a few. Thank you.