√ Don't Forget!
Is this a cross appeal? See Pa.R.A.P. 2136 (for order of filing briefs in cross appeals).

√ Don't Forget!
Make sure your brief and reproduced record conform to requirements set forth in the Rules. See Pa.R.A.P. 124; 2111; 2112; 2116; 2118; 2135; 2140; 2152. CHECKLIST FOR BRIEFS

Make sure you file and serve the proper number of briefs and reproduced records. See Pa.R.A.P. 2187.

Have you been granted leave to proceed in forma pauperis? If so, you need not reproduce the record, Pa.R.A.P. 2151(b), and you need serve only one copy of your brief on every other party separately represented. Pa.R.A.P. 2187(c).