Gambits...which to take and which to decline

I'm new to gambits and am playing a higher rated friend that plays a lot of them for the opening. Are there particular gambits you should always take and others you should deny. And if you deny, what next (I realize it's different in most cases). My friend suggest always accepting gambits at my level for at least learning moments. 

Is there a "GENERAL" rule about accepting or decline gambits? If it depends, which should you generally accept and which should you generally decline. I'll look up what to play after...

Thanks

I'll just name some gambits off of the top of my head

Englund Gambit: Accept, then develop normally with nf3 and nc3

Queen's gambit: Decline with c6 or e6 if you don't want to learn Queen's Gambit accepted theory

Evans Gambit: Accept, then drop the bishop back after c3

Budapest Gambit: Always accept

Benko Gambit: Accepting or declining is fine, but decline it in the right way

King's Gambit: I would accept and then give the pawn back with 3. d5, but there's so many variations of KG accepted

Milner-Barry gambit: Don't take

Danish + Goring gambits: Accept the first pawn on d4, then decline the second pawn with d5 after white plays c3

All I can think of as of this moment

I'll add some: 

Blackburne-Shilling: DON'T TAKE ON E5

Duras: accept

Staunton: know the correct way to accept, or your position will be collapsed quickly

Blackburne-Kloosterboer: just don't gift back the pawn

Thank you, gentlemen. Never heard of most of those, but I'll find out which he's playing and learn the lines. Again, thanks and thanks to any future answers.

Just search them up. Also, what opening do you play?

I've been experimenting with the queen's gambit, but I only know like 4 moves in so far. My friend plays the king's gambit and the danish quite a bit. I'll also experiment with the King's gambit since people at my level don't usually recognize it. In fact, people at my level almost always play d4 where as higher levels usually start with e4 openings. Since I only have so much time to study, I was hoping at least this question had a more standard answer. 

When I'm black, I've been playing the jalalabad just for fun. I recognize I'm probably not good enough to make the most of it...but it messes with people's head at my ELO.

Tried to give you some more feedback in the red

How I do it is just learn the lessons in chess.com Learn lessons --> Get better --> Understand the position better --> Understand how to deal with gambits even though you might not know them

DaBabysBurner,

thank you for the candid answers. No BS but not insulting either. Again, thanks. 

Note: The general rule about gambits is you accept them and outplay the person who plays the gambit/ staying alive without losing too much material (For some gambits)   OR don't accept the gambit completly (or not at all) and then find a way to defeat it.

This is a ultra hyper double pawn gambit against the Scotch that I sometimes go for !

#1
"Is there a "GENERAL" rule about accepting or decline gambits?"
Accept them all. Take the pawn, defend, win the endgame. It is easier said than done, but each time you fail, you learn. Think carefully about how to organise your defence.
Do not get greedy: 1 pawn is enough to win. If your opponent offers a 2nd or 3rd pawn then it is often wise to decline the additional pawns.

This is what I call ultra hyper gambit after gambit 

gambit #1 - c5

gambit #2 - d5

This is a mixture of the Kings Fianchetto Opening the Lasker Simul Special variation of the Kings Fianchetto Opening the Guioco Piano with 4.d5! the Vienna Game : Andersen Defence the Ruy Lopez Opening : Cozio Defence  and the Bishops Opening : Khan Gambit !

With exceptions. 

All of that plus the Italian Game with 3.d5!

What about the gambits I mentioned above ? Accept or Decline !?

#18
Accept them all.
Only exception = Queen's Gambit, though you can accept that as well.

Why?

Queen's Gambit: decline, or if you accept it get ready to give back the pawn. King's Gambit: accept but know some theory or else decline with 2... Bc5. Smith-Morra: definitely decline and transpose to Alapin if you're not a confident defender. Evans: accept and go 5... Ba5 or Be7. Vienna: decline with 3... d5. Latvian: take on e5 with the Knight. These are the ones I can think of rn