Here's a silly question.
What's the best way to execute a "tilt"? I know you can pull them off the same way you'd use a smash attack (A + whatever direction), but I always seem to get them accidentally as opposed to when I really need them.
How do you guys pull them off? I've never really conditioned myself to using the C Stick or anything like that. Is there some trick that I'm just missing?
I honestly had more trouble with this than I should have when I started playing as well, but you aren't going to like my answers.
Your first, arguably easiest option is to set your C-stick to do tilts, known by some as T-sticking. Not only will this let you do them easier (since using the stick eliminates the possibility of doing smash attacks instead), but it's also useful for some mid-high level tech. However, if your problem is performing tilts when you want to perform smashes instead, this will not help at all, as you can still get tilts from normal means as well.
The second method is to simply practice the timing of when you input the direction and attack commands. Putting them too close together is what gets you accidental smashes, while spacing them further apart gets tilts (if you did the direction first). While this technically works, and can be useful for learning to utilize tilts, it simply isn't viable in competitive play most of the time. The purpose of using a tilt over a smash is generally because they are faster, and intentionally waiting between commands completely nullifies the advantage in startup speed.
The most common (and incredibly useful to learn) option is to simply practice not "smashing" the directional input. This can be achieved through moving the joystick more slowly in a direction, or ideally just by stopping short of pushing all the way in one direction. While it may feel infuriating to pick up, this will get you the most milage in terms of your gameplay by helping to eliminate accidental smashes AND tilts. You may opt to switch into T-sticking still at a later date, but this is really a must-have skill to utilize both tilts and smashes well.
Finally, for a quick and reliable fix, you can always use other moves to avoid smashing. While you are in an animation that cannot be altered (like in the middle of throwing an attack or rolling), if you know what tilt you want to do immediately after your current animation ends, push the direction while still locked in your current action. While you can use this to "buffer" moves (have them occur on the first frame possible), if you're having trouble getting tilts I'd suggest inputting the direction ASAP, and then waiting until the last second to input the attack command. If done correctly, this will allow you to buffer tilts, though some characters's quick recovery time on their moves makes this a bit difficult. This should also only be done in conjunction with one of the earlier options, as it won't help you any if you aren't currently locked into anything.
So, TL:DR, best options are either learning T-stick control schemes and/or more precise joystick control, but there are other ways to do it as well if you need a jumping off point.