What happened during the breakup will determine how hard it will be for you to recover and reverse the situation.
If you weren't able to maintain composure and lost control during the breakup then it will be much harder to console and ask for forgiveness from your partner.
Here are a few tips when you're trying to recover from breakups.
Don't contact them for two weeks to a month.
Allow some free time for you and your partner. Give them enough space and time to let the strong emotions settle down. However, it should not be more than a month. You want to get them back and not let them go away.
Ask for forgiveness for your misbehavior during the breakup but don't go into details.
Call them up and apologize for your behavior during the fight. Do this sincerely but don't go into the details. You want them to forgive you but you also want to maintain composure. Don't remind them of the exact details, else their minds will return to the experience and remember the strong emotions and pains they experienced. There's a detailed explanation of this on my book below.
Ask them for a coffee meeting, not a date.
If they haven't asked you out after the first post breakup phone call then ask them according to the manner in the book below, it will explain to you how to get them to say yes or in most cases ask you out first.
If you've decided to get your ex back then listen carefully.
Plan it as soon as possible, your ex is not going to be around forever...They will eventually find somebody else and they are going to hook up with them...They are going to fall in love, they are going to have sex...so on and so forth...